Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e465561d54c0e5…

MALICIOUS

PDF

75.5 KB Created: 2021-04-30 21:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 2cb9712067adbae516c39b494963eee7 SHA-1: e7813746ade73daab8a5ba7879b22af5345da057 SHA-256: 08e465561d54c0e575084e356910fbe10f3de505c05c43ca718e074a2db38538
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs, with a prominent one pointing to 'xezojetit.ru', suggesting a phishing or malware distribution attempt. The PDF's structure and the presence of multiple disposable hosting links indicate a link farm designed to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=flowers+in+the+attic+book+series+in+order PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403410/normal_600699b146020.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/v9ZpGid/78104376071.pdfIn PDF document text
    • http://sodalabs.pro/14329451757s8pe6.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/toad_for_oracle_11g_free_download_fus4pqy.pdfIn PDF document text
    • http://hardcreditcheck.info/dawezegolexosuperudinadajlg1m.pdfIn PDF document text
    • http://kpupnov.pro/dilamitarewifobudewofep86nnz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5fde4d62ad984.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/heAgid9/92092226043.pdfIn PDF document text
    • http://cheeronthemove.store/jemijonaxiwatepcnfnp.pdfIn PDF document text
    • http://aarbuz.space/332424867192wpj8.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/xikukopami-kapadakewetix-duvel-risasonip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_604a76138a388.pdfIn PDF document text
    • http://center-san.ru/why_does_microwave_not_heat_food1eaho.pdfIn PDF document text
    • https://renijavodis.weebly.com/uploads/1/3/4/7/134709946/8f7c1.pdfIn PDF document text
    • http://fenellalucynelle.info/92341218719sceuc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dutugege.epizy.com/46704359586.pdfIn PDF document text
    • http://tamevebuzonufi.epizy.com/70691515351.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C6 5280 bytes
SHA-256: a440b75a143d0c45cba41ea5c62d82db8378ffec782292baaae4f5c799545d97
font_01_sfnt_off0000fac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 11400 bytes
SHA-256: 415b3043da059c62e09e63d7182d6a4846147653661104036d8ea30a0c5ebb6b

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