Malicious PDF — malware analysis report

Static analysis result for SHA-256 76168e2d5f2216f5…

MALICIOUS

PDF

68.5 KB Created: 2020-11-11 15:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 16be5833842faa449a88639a18954319 SHA-1: de551e89b6df51262a9a08280200eea831d61769 SHA-256: 76168e2d5f2216f507d1278bdae2fd7daf51addd2f554e56998ee4027c42f413
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, and a heuristic firing indicates it's a link farm designed to redirect users. The presence of urgency language further supports a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it may leverage JavaScript for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6742

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/123?utm_term=resin+drip+tip+for+smok+tfv16 PDF link annotation
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/bujixotaxe.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/zalawumavujiv.pdfIn PDF document text
    • https://gesoroserazam.weebly.com/uploads/1/3/4/3/134310447/bevumov-vasexiga.pdfIn PDF document text
    • https://monotolifevi.weebly.com/uploads/1/3/4/6/134683372/6577771.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/mapan.pdfIn PDF document text
    • https://bonivodetago.weebly.com/uploads/1/3/4/5/134517527/gedojakok-xuxedo.pdfIn PDF document text
    • https://pumewuku.weebly.com/uploads/1/3/4/6/134638235/nulitenanuduninu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369317/normal_5fa7db7767e82.pdfIn PDF document text
    • https://fufijejelido.weebly.com/uploads/1/3/4/3/134351462/sidebasok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5fa20d6d85369.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/kewakuko/xozuda.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/nemesis_agatha_christie_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/17246952489.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/8650101851.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC535 5072 bytes
SHA-256: c78a8f8524179500f6315c29fe77979f38a26237591b3dc4387ebd4ebd99e7a9
font_01_sfnt_off0000d66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66A 12180 bytes
SHA-256: b93d107c9150007721056b8b6fc3d0e0967b23b34fc5357ff08658a1ba2ac2ae
font_02_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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