Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e1cf1848762265…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 01:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cadce53b9438669320609fbfbd0f1278 SHA-1: 11ff03c40946b5c2b1b9ea6e20fd5f7cd82725df SHA-256: 11e1cf18487622653755fab1b5dda19fc47b5f1926b6deab75380984d8dc7a7b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffine.ru/strik?utm_term=accounts+receivable+balance+sheet+classification PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497109/normal_5fc48f1f3ad23.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/butowup-losubom-kozuzi.pdfIn PDF document text
    • https://sovirolozemeze.weebly.com/uploads/1/3/4/3/134337586/xifup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f98d78ca0ab7.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/nipezewolizovajokas.pdfIn PDF document text
    • https://siwikuzovusodig.weebly.com/uploads/1/3/4/3/134357046/1323796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5fa3e6579e7d8.pdfIn PDF document text
    • https://najanirirapodu.weebly.com/uploads/1/3/4/8/134860062/2218345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5fbf3e90cbc51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fbc107-fa2a-4e28-95f0-97d4fe4edaac/937227598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ac6441-3ab3-4d60-a33d-66ad63cea0fb/sidemen_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc111482-6dac-4ae9-82e4-0036660fce23/felker_tm_75_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1294717-3193-415f-84ce-41bc43a8fed5/skyrim_vampire_eyes_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6580dc35-514e-459f-a645-bc71cfcf027c/16753951894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81910c11-e1a9-4a90-bcbf-71082f215da3/77080494812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1921cd9-ab8b-438d-b9ec-6281333a6614/96592755852.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_off0000cf2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2A 5156 bytes
SHA-256: dd8e26cc311339d5c426fdbb6e04793ee4293ccb16dc5fd586bea9ec3236255a
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10492 bytes
SHA-256: 70bd67cdf2e49c05716ce1fa5977e7570af1ad352e906e53e4be0aed07bf95ad

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