Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a002c0d3d5a58c…

MALICIOUS

PDF

74.8 KB Created: 2021-01-12 00:56:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b2e767a4505a8de38586d94419033ee7 SHA-1: a754eb21dbb26a91f40cc377a07c372a4023efcd SHA-256: 81a002c0d3d5a58c0739da5908aaf6e2bfc06632661b4114b7b34b5b2351d112
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URIs, with a primary one being `https://trafficel.ru/aws?utm_term=lol+gnar+aram+guide`, suggesting it acts as a lure to a potentially harmful site. The document's structure and embedded links point towards a link farm designed to redirect users, a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=lol+gnar+aram+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444113/normal_5fd959d0e9602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5ffb20eb36808.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/jeHhiia/word_finding_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/WYjdibZ/instagram_followers_boost_online.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/gxNXVjb/39217287203.pdfIn PDF document text
    • https://site-1175068.mozfiles.com/files/1175068/31621212017.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/5177298090.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/jFgimgf/the_hangover_part_iii_album_songs.pdfIn PDF document text
    • https://site-1217437.mozfiles.com/files/1217437/download_superior_tactics_rts_mod.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/araba_oyunu_indir_apk_day.pdfIn PDF document text
    • https://cdn.sqhk.co/vizinifum/jhifWhh/6653436372.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/gheoheB/marketing_manager_resume_sample_doc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gupuso/ged_constitution_study_guide_illinois.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 4712 bytes
SHA-256: 7e7822e94023d552e8226c4e1a7466cddd52206f82a4671a355809d5f800584d
font_01_sfnt_off0000eb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB61 10524 bytes
SHA-256: d4737d8c2bfd4f0856f0623135b8a0936b820fa903fc419309b32a6f04cb0ee4
font_02_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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