Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59d82af891bfa24…

MALICIOUS

PDF

65.4 KB Created: 2020-11-18 23:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bebd71845ed5a16cb1f80f96cf86f23d SHA-1: 1237f8235eb65fecb20f03a3f31ef6fe7743edad SHA-256: d59d82af891bfa24c686338d335c083dbff89b6654599e02fc19a062ca56fc66
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://traffnew.ru/strik?utm_term=ong+bak+english+audio PDF link annotation
    • https://takotifisusa.weebly.com/uploads/1/3/4/4/134499816/f8d539527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5f9cfaec67ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5fab367b91e88.pdfIn PDF document text
    • https://sutudaxete.weebly.com/uploads/1/3/4/4/134497902/taridele-wesaxu.pdfIn PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/biduwepegukekow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fb54bbfa1730.pdfIn PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/nudoxeli_siginobopuw_vofonutiwovijus_wikiliz.pdfIn PDF document text
    • https://roneresikixa.weebly.com/uploads/1/3/4/4/134476702/jakobuna-jakipukikew-suxipafov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_5faf961938483.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/a77ec655fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_5fa6b46231c55.pdfIn PDF document text
    • https://gemigefe.weebly.com/uploads/1/3/4/6/134602098/dovemososalorugupoze.pdfIn PDF document text
    • https://vojojetisas.weebly.com/uploads/1/3/4/5/134589564/02a6cf340a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/setikizo/97453059055.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/6943533910.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF83 5224 bytes
SHA-256: 4ee4fb458c21ff910db9c82d7ba4a8e27ee609d0606550a029d453c0c10511c1
font_01_sfnt_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 11176 bytes
SHA-256: ab24527cf1c3ba66b1356f14162aa6a980e0c55091f62dffad4b02169bcae2f4

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