Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bf07eb7c00ffed…

MALICIOUS

PDF

60.2 KB Created: 2020-12-02 18:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c579be14ff20bccdab65c3aac324c082 SHA-1: 13d124e5853d7aeb48e50b0b30788306e22621ec SHA-256: c0bf07eb7c00ffeddc6d6835ff60b71fc3fa50219e50b8743b1a43d0557849ab
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 0.9996

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=2008+ford+explorer+sport+trac+owners+manual PDF link annotation
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/4dfe47e7.pdfIn PDF document text
    • https://widufosonetorif.weebly.com/uploads/1/3/4/5/134598319/a62da61db608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fa71b4142203.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/voxexinelosiremejas.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/nitisonixivap-tinitev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485943/normal_5fb35e8abd993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f9cee75e3adc.pdfIn PDF document text
    • https://pesawesezopi.weebly.com/uploads/1/3/4/3/134327800/gajav-kobox-ziguxuji-widuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fba1d7e14432.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/b6387abb-36e1-4ff2-9b84-df7431196d0e/girls_showing_panties_videos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294961452f90b7fefeff3/t/5fc37be7fa04221c718ccc59/1606646760368/th_9_base_defense.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/946cc750-5d7e-4602-83bd-17d423ae068a/dumanuzuzapiteretuxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2b72bbd740658066ec4/t/5fc20adce6d49a06bbd9ae07/1606552285728/lopefodi.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_off0000aed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED8 5832 bytes
SHA-256: 3f10ab90afc7082b439053ce1a37b38eea834c4f6b163745ee0b0bff74db8171
font_01_sfnt_off0000c2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BA 9816 bytes
SHA-256: 6acd1c11733611220e666c6d3f724176a87691536c7542f0722936fd7797f9e6

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