Malicious PDF — malware analysis report

Static analysis result for SHA-256 2396e77a3f953654…

MALICIOUS

PDF

79.2 KB Created: 2021-03-25 08:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a1cd17b9f65113e405adeb7825f3f8c SHA-1: dec6ce31156dd07dbdd8b5d37ab5ecb953edc8f2 SHA-256: 2396e77a3f9536545e2480745dbdc483267464bff7efaaa10cf9916f9e571237
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary purpose of directing users to potentially malicious websites. The document body, though heavily obfuscated, suggests a lure related to a search query, aligning with phishing or malware distribution tactics. ClamAV and ML classifiers confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=how+to+play+greensleeves+on+piano+easy
    • http://help-lnstagramcopyrights-verify.com/fareler_ve_insanlar_olay_rgsfdwa4.pdf
    • http://salet.store/are_the_game_of_thrones_books_appropriatea41qb.pdf
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/revizemij-gejej-sarodafezimi.pdf
    • http://rakadan.sportsontheweb.net/45157036522.pdf
    • http://stikc.xyz/kendo_ui_editor_template_dropdownh5z6g.pdf
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/919f294b9db7c87.pdf
    • http://vvinorama.fun/sofekafitugawr6q1.pdf
    • https://cdn.sqhk.co/wopidevepip/Agg4ih8/44260108919.pdf
    • http://wiboratiraveguw.mygamesonline.org/rigodozidugorasoxelarob.pdf
    • https://vuvararuwojagis.weebly.com/uploads/1/3/4/6/134608035/799f21535e907.pdf
    • https://cdn.sqhk.co/jagapifa/M7DiazN/jolowukede.pdf
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/fanikabujo-zaveratufafe-nukosovaxu.pdf
    • http://dojemop.mywebcommunity.org/html_code_for_web_design.pdf
    • http://winoraama.fun/lippincott_pharmacology_7th_edition81son.pdf
    • https://lejawoxaniw.weebly.com/uploads/1/3/0/7/130738778/06878.pdf
    • https://cdn.sqhk.co/zebimapajod/eWPbzSy/boo_2018_movie_wiki.pdf
    • http://mebovedu.getenjoyment.net/sample_application_letter_for_bank_job_fresh_graduate.pdf
    • http://jajuviramigawo.medianewsonline.com/alchimistul_gratis.pdf
    • https://cdn.sqhk.co/lexaxemiji/hfjhodU/daytona_international_speedway_ticket_office_phone_number.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fff4f109-c123-4844-a906-faf63cd1cc3d/44172391861.pdf
    • https://uploads.strikinglycdn.com/files/732a6f05-966c-4619-bce7-c943c2338792/totifuxoxirowizam.pdf
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_aed53654a3644f50b7f71ce2c1f19f31.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f18842cd-3867-4128-896d-cdbd72477a0e/57041588963.pdf
    • https://9d2e5ffd-2665-450c-83d6-15faf52bb98a.filesusr.com/ugd/be19e1_441f290d58734ee58b1ea38981094d47.pdf?index=true
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_c2e64e4dbe1f4f3698437f7a7cf8a312.pdf?index=true
    • https://uploads.strikinglycdn.com/files/33b28834-1b91-42ca-8144-4118010fb9a4/sepepel.pdf
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_395435ace1634141ade72ad26b5a0028.pdf?index=true
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_c67951b09363491881dcc53bf0a5247e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f764.bin
86db33b459b032717d755fba8aa20bcd608105ad92cd83b4998385a0027e81b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 5200 bytes
font_01_sfnt_off00010947.bin
2689fe485e50b6977a0d2928ad57ba8eafd65647b0f46badb07603e01028f7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10947 10500 bytes

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