Malicious PDF — malware analysis report

Static analysis result for SHA-256 1808278b78931b3f…

MALICIOUS

PDF

88.5 KB Created: 2021-03-19 12:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c3eb7ed189a3dcd18108ba710cc720f3 SHA-1: e6d8ddd1cf4f9bdc87c549a4912a92a643b06bd9 SHA-256: 1808278b78931b3f3e86ade6ad7f1c5fb5afe520cb881c1b240b1548286fe3c0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive web presence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • 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 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://nipisod.ru/award?keyword=cytoplasmic+genetic+male+sterility+pdf PDF link annotation
    • http://pagebake.com/foravanizufepyrln4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_600f590d9c9c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497658/normal_603d8d88e5b70.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/WidBdme/39933011167.pdfIn PDF document text
    • http://muzoc.xyz/how_to_drain_a_haier_chest_freezer4sp7e.pdfIn PDF document text
    • http://urologo.store/tokyo_ghoul_season_3_finaleyq4li.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5ffb434995330.pdfIn PDF document text
    • http://twirlini.com/72917904497glntl.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/ZhdTXNR/soparewizuzowefox.pdfIn PDF document text
    • http://knitfqph.site/15011592049xxnn7.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/sharp_microwave_oven_repair_servicerz8uf.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/jjfyibX/basketball_swipe_an_addictive_basketball_games_unblocked.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449406/normal_5fe5d90faaa54.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/6569829833.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/what_indian_foods_are_gluten_free0ntfi.pdfIn PDF document text
    • http://phillipen.online/14212170354phyec.pdfIn PDF document text
    • http://handler-autoscout24.com/bandhan_bhojpuri_movie_dj_songhk6u6.pdfIn PDF document text
    • http://erogan-columbia.site/86884631875wjvr8.pdfIn PDF document text
    • http://kasyanbeauty.com/dadijupufifaluwapesurazdxjr3.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/i2hajeL/rock_and_roll_flip_flops.pdfIn PDF document text
    • http://artrosil.xyz/fuliwasx5o6.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/thea_stilton_books_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ziwivazud.onlinewebshop.net/decode_base64_c.pdfIn PDF document text
    • http://vekabun.myartsonline.com/41906859033.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 5388 bytes
SHA-256: 75b7a73082776a7e2a058d8a6788a2255009423299a85f4675d35068a5d015cb
font_01_sfnt_off00010cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB7 10496 bytes
SHA-256: 3a8258ccb0c2c05ad0cda2cd71b88a4c0e370f79a30b6619f8afa2a75baed84f
font_02_sfnt_off000130e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E7 16088 bytes
SHA-256: c8cad0fcbf711734ba90d1bf0f33d5774ae0d43a5fc07b95f2d0d23150af1919
font_03_sfnt_off000145a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e