Malicious PDF — malware analysis report

Static analysis result for SHA-256 216a13cc6c92fb03…

MALICIOUS

PDF

127.2 KB Created: 2021-04-04 11:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 296b8dbb72b98280bff714e409f022f2 SHA-1: d47e2c275d5a4218871d6b97101f265c818c5ffa SHA-256: 216a13cc6c92fb030b128020d95ec7a3d8da5862616709b9578374d7f6ea89bb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDF documents. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://vilenefex.ru/award?keyword=afl+season+fixture+pdf PDF link annotation
    • http://domainlimax.xyz/316564810993w5wy.pdfIn PDF document text
    • https://vapulorefemefiz.weebly.com/uploads/1/3/5/9/135956910/ginuni-lemimazefipi-wofogasinubed-votiw.pdfIn PDF document text
    • https://tadomowiwelam.weebly.com/uploads/1/3/4/7/134744739/lexoz.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/9fd2e689f0b.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/06bcbbf554d60.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/nuveruva.pdfIn PDF document text
    • http://wusumomijo.medianewsonline.com/decimals_worksheets_grade_6.pdfIn PDF document text
    • http://shopsmmv.site/scott_foresman_grammar_and_writing_practice_book_grade_4dux9p.pdfIn PDF document text
    • http://raisinsapp.club/was_macbeth_a_real_person_in_historyj0s3r.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/diary_of_a_wimpy_kid_double_down_all_pages.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/magnetic_balls_game_apk.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/absolute_friends.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/pegoworigevefowiwutofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5792194f-7a04-45be-bc9e-76cb99b8d1b5/14254191448.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/muxasuxizusazewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b95c0c6f-e211-49a1-bda1-f40a4c726b35/sadizadevusupufifur.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/aphanitic_texture_form.pdfIn PDF document text
    • https://92fbd7ca-8480-4723-bb2c-19523f9dca15.filesusr.com/ugd/29946e_e36d54e1583f4489a923289780c6b4c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd140a82-3a78-4ea3-87c7-9db0cd489b5e/vawelok.pdfIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_7f1ba22ae4a94fdfa3b7c866fd014e1c.pdf?index=trueIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_789e0b0d57b240e5b35581469cf7407c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/19352468129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e925b2-fefc-4540-b85b-beaae823854b/46472667934.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A03E 5092 bytes
SHA-256: a7539b717317b1cddbcfc4d301f681b465c7221f2cea2f3588d40bf794af2907
font_01_sfnt_off0001b1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1AB 11712 bytes
SHA-256: b687d2eeeb4c253ff3856d0a6d2a647c08bfd568070a82e5b71ec0c41d089155
font_02_sfnt_off0001d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9DF 16064 bytes
SHA-256: e9cf687b76f137aec67d68831f9d11b8b042d8608c48378d8b0ece48f167d107

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