Malicious PDF — malware analysis report

Static analysis result for SHA-256 2468eaed3c156597…

MALICIOUS

PDF

68.1 KB Created: 2021-01-12 00:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e91d2fc2dc3540078f13632894c16b3a SHA-1: 207108b4971865f93727998d97d4ade548541d6e SHA-256: 2468eaed3c1565978452670b4638c0d2123c68fd3122813fabda55c0151672c5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan strongly suggests malicious intent. The document body, though heavily obfuscated, contains a lure related to "bhaiya tamil songs free", likely to attract clicks to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://trafffi.ru/aws?utm_term=bhaiya+tamil+songs+free PDF link annotation
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8154179.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/f96a479cf44.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/maxalosuboz-xetojubofapuve-fixavigibodur.pdfIn PDF document text
    • https://vimikipemaw.weebly.com/uploads/1/3/4/3/134331773/kekowifatemivozesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fe43f643c6a5.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/EhbKjbT/2020_election_ballot_sample.pdfIn PDF document text
    • https://bewobuvepo.weebly.com/uploads/1/3/2/6/132695749/7252743.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/Xhhjjx8/44934365727.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/jedobufudajewu/denapajonu.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/chef_uniform_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/assistant_commandant_cisf_uniform.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_off0000c104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC104 5120 bytes
SHA-256: 469d5e80d508b5d0550af74cf8b5608d72c8c91f234079e7347305f209c5785c
font_01_sfnt_off0000d249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD249 10716 bytes
SHA-256: 9ca642d9f9eb3c4420e8f66b977d078f14ef82ecd176482db8687a4c7b21dca6
font_02_sfnt_off0000f5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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