Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e22f3fbfbb8a68b…

MALICIOUS

PDF

75.7 KB Created: 2021-02-12 11:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 83dc2be70d46704d52ba55c8ec489e90 SHA-1: eb181cdfd94c56b3c490f8258a4d5c2f9ed69324 SHA-256: 2e22f3fbfbb8a68b55935d616a5c22e23af080db044166b1878fd54b941eb30e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=boni+mwaitege+imba+video PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5ffff3a74a0b1.pdfIn PDF document text
    • http://vazosuzited.22web.org/valentine_day_pic_free.pdfIn PDF document text
    • http://salopkisa.website/ark_single_player_settings8zoul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_600e7d1809651.pdfIn PDF document text
    • http://citimart.online/arteriovenous_malformation_of_uterusidb9i.pdfIn PDF document text
    • http://abzac.me/44894040502f4lv0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5fc76337d361e.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/chhota_bheem_wala_game_karna_haic71q7.pdfIn PDF document text
    • http://ewop.space/vw_passat_2016_manualyaxkh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412568/normal_600cf4761b82b.pdfIn PDF document text
    • http://maporivibadiwaj.iblogger.org/9306602185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nawevuf.epizy.com/kesowipiwigukelabovapuni.pdfIn PDF document text
    • http://lisirowi.rf.gd/zepowipilozu.pdfIn PDF document text
    • http://tafobinememen.epizy.com/team_trivia_free_answer_of_the_day.pdfIn PDF document text
    • http://vezuzatutuxi.epizy.com/57914878398.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/bachelor_of_business_information_systems_deakin.pdfIn PDF document text
    • http://josuguremim.epizy.com/35908638553.pdfIn PDF document text
    • http://xubudexev.epizy.com/39148716600.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_off0000ce56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE56 5180 bytes
SHA-256: 668e0bdd764b76b0af2358b2e49e7e6db6f846a69062e684fb2977feda7446f4
font_01_sfnt_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 10576 bytes
SHA-256: 64a0b3420f87720a7f478d25e49fff519efff50907ba2a499e17e2bdc15a1602
font_02_sfnt_off0001043c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043C 18776 bytes
SHA-256: e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed

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