Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1f4f441a83fad6…

MALICIOUS

PDF

76.7 KB Created: 2021-05-19 12:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 593b20140d008968a5f394c3f1f308ca SHA-1: 54da37f29af23d5b0132515539db755547dde02e SHA-256: 2e1f4f441a83fad622e776faab5d14c0bf177770e2abbf793656ac012978f113
156 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 0.9996

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 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.
  • 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://fokemale.ru/strik?utm_term=t%25C3%25BCrk+komedi+filmleri+izle+indir PDF link annotation
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/045741b08109ecb.pdfIn PDF document text
    • https://vikisoxez.weebly.com/uploads/1/3/4/7/134712259/e34a59dcb424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_60084abd539eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_5fe99699b802b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493195/normal_5fd6459c79790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5fd2393c2357c.pdfIn PDF document text
    • https://fikadodovawewa.weebly.com/uploads/1/3/4/3/134320255/tegederexifoxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5fc96c253c8eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_5fe455c21f30b.pdfIn PDF document text
    • https://pixabetamomu.weebly.com/uploads/1/3/1/0/131070001/wumabixaguga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5fe14f9661078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5fd161eaf4197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453901/normal_6041a06fe0768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_5fd912850b469.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_60047199a102e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_60186d9415b9f.pdfIn PDF document text
    • https://pitubesisimebi.weebly.com/uploads/1/3/2/6/132681325/mapitixited-fopaziw-sumemuduvugati-sosodewawik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6062eea0d4d9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_605c86d887c7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_5ff1207e39df3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368782/normal_6004690672225.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 4848 bytes
SHA-256: 86ac6aa9ad36234792d8ca6a998396a62d14319b4469d99559d94769370048cc
font_01_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 11520 bytes
SHA-256: bb25a4b3579b6637171f3a2ef2148f2f2e28e0f8ad8f2fd3764d6e66a9cf0eba

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