Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d17c2b3262da6c…

MALICIOUS

PDF

98.9 KB Created: 2021-04-22 23:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 38f25f438ba50114e613925c48c784c6 SHA-1: d7a3e80be7e81d4b452bcea5d2352805f95a35bf SHA-256: 34d17c2b3262da6c4a3d09e436bbaa1166708f8021c18e8983b7c00ec2a0b358
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=samsung+grand+prime+plus+battery+price+in+pakistan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415055/normal_601421141efe5.pdfIn PDF document text
    • http://kimelaxuwivupa.iblogger.org/83088826820.pdfIn PDF document text
    • https://tadiseregofinu.weebly.com/uploads/1/3/4/7/134748358/16b466eaa717.pdfIn PDF document text
    • http://fibilif.iblogger.org/bavawawoxekagiloresog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_6019b3b58f622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_600bb4d012225.pdfIn PDF document text
    • https://fowifosefudewak.weebly.com/uploads/1/3/4/6/134699900/robanulul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501198/normal_5ffece24e9a23.pdfIn PDF document text
    • https://nagobajega.weebly.com/uploads/1/3/1/3/131380413/vopefovotelotagivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_bfdd317c643648dfb16f5c60b682e2a1.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_d87c30130b39419db995f7c0d0dbb626.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d317d7c4-e9e8-4015-889e-ac09d5cba4e6/is_there_going_to_be_a_season_5_of_the_crown.pdfIn PDF document text
    • http://setevibebevu.epizy.com/81947681807.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/definicion_de_punto_en_las_artes_plasticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c20615ec-3ce2-4835-8f13-c608bc9c1cc1/jewish_bible_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb99bfb-44d8-4696-aadd-1fd97c8a031f/9372236888.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/best_comics_for_15_year_olds.pdfIn PDF document text
    • http://pikimavijepe.epizy.com/55343278503.pdfIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_b19da61c792f42b7b03e3d4d4dcfde64.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a357a4-d221-457d-af0b-6d486d733f84/duderijexowavaduwukapufo.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/a_thousand_years_piano_accompaniment_sheet_music.pdfIn PDF document text
    • https://60b161a2-b511-46bc-b48c-7ca4331f2db3.filesusr.com/ugd/34b71b_32359545c7bc4db3a526308e82ab89d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxexi/what_stock_should_i_buy_today_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fac1e0-2760-4d9f-b8ce-612a025c4934/dabow.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/visiting_cards_samples_templates.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_5adad9688378481aa07edb928360ee4c.pdf?index=trueIn PDF document text
    • http://xugadizedema.rf.gd/movie_oxford_dictionary_definition.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 5804 bytes
SHA-256: 9faad98df2d8d070e19f2a380148825c1bfba60f0fb0ff20c1cca990a40fdbe2
font_01_sfnt_off00010b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 2196 bytes
SHA-256: a8cf1f6177f3771f7676584a6964990e56c66b581344c910fd84494c10678f26
font_02_sfnt_off000114e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 3852 bytes
SHA-256: 71c98f1f0ae2ef9333828ee85ea83c9551a83b06002846ea3a22cec639e85686
font_03_sfnt_off000120a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A6 2800 bytes
SHA-256: 1fe8b5a92c166e512656d86ad50560a9ebd38fe4dbee5671ff8f7d8424607e38
font_04_sfnt_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 13904 bytes
SHA-256: 25133ca816399c36e0c63d30d142a21a1391c611e5af0cf5155af4dcfbb5e60b
font_05_sfnt_off00015910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15910 16912 bytes
SHA-256: 4da62de1c2a81427282d388b8414d05926b786cc592dc7a244bcda721a91c768
font_06_sfnt_off0001717d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1717D 2416 bytes
SHA-256: 803a799a3a3d74ccbbfdd2dfe625cc600c950a137856990b55fd8c1d0fd20ad7

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