Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3947b1e2781ad91…

MALICIOUS

PDF

76.8 KB Created: 2021-03-03 02:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 879c69fea4935dadca3d31f4f881721c SHA-1: b0fddadb0a69b5cd120d5e60a078a7c159de185a SHA-256: f3947b1e2781ad91611abb6b203a6a108d99a8c1668c294089bfe39495f035d9
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure strongly indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://soxebez.ru/123?utm_term=sweat+play+review+london PDF link annotation
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/watatav_bixofum_xavigetolamuwu.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/4554137.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/kujiwemexex.pdfIn PDF document text
    • http://tehnopolis.org/592509156523caxx.pdfIn PDF document text
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/vakax.pdfIn PDF document text
    • http://fatiberekizibu.iblogger.org/peviregixetumedore.pdfIn PDF document text
    • http://alisabor.design/audacity_free_onlineh5v1w.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/8293683.pdfIn PDF document text
    • http://promooffer.site/smartsheet_login_history4he0k.pdfIn PDF document text
    • http://endi-itali.space/is_mother_nature_in_the_bibleo21x5.pdfIn PDF document text
    • http://ttttrrrr.space/webegur4n381.pdfIn PDF document text
    • http://dommasters.site/how_to_prepare_meeting_reporthqu1m.pdfIn PDF document text
    • http://zevuzigix.iblogger.org/fallout_3_prima_official_game_guide.pdfIn PDF document text
    • http://vokegitejupud.iblogger.org/gamizowugutiwunufoju.pdfIn PDF document text
    • http://sallely.xyz/julorenemakobovozexoqubrf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jikolelekad.epizy.com/chapter_12.2_meteorology_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/how_do_i_fix_code_p0138.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/bobagiledivezukofofeseg.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE4 5132 bytes
SHA-256: fdfeac4208c82f64189632d8fe251ec45f19223e3451c61fc12d5262cc0f90b8
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10740 bytes
SHA-256: 4b747c0413dcb0e65dcf095f6c7709fcca9a46211a6f0379b7104fecbfe55150

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