Malicious PDF — malware analysis report

Static analysis result for SHA-256 4047eca9404b703d…

MALICIOUS

PDF

70.1 KB Created: 2021-01-08 10:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5413c1d27abe01f92f025f2b87b2054a SHA-1: b231442f1879631e7ea66540c7a06d8b32a431fa SHA-256: 4047eca9404b703d4ffb9a589acdf15d22edea387fa3088906787c391f46d7dd
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

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://trafffe.ru/123?utm_term=dr.+phil+wife+skin+care+line PDF link annotation
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/pabebiwukogejafituw.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/bubad.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/H4hfgiM/democracy_company_meaning_in_telugu.pdfIn PDF document text
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/945d2.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/hjhogiE/pamugegokil.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/tamovekefad.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/gatan.pdfIn PDF document text
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/ledemuros.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/xasomifogevozak.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/c9DP3ge/31792412281.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/a47c4b564.pdfIn PDF document text
    • https://rofubedojatedo.weebly.com/uploads/1/3/4/5/134586725/voretarazuduvifa.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/dZGgfjh/bipofifu.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_off0000d37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37D 5288 bytes
SHA-256: 2007623598e8382e740f8984ff59c5c1727838ba89e3380b07fef97d3d3988bc
font_01_sfnt_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 11260 bytes
SHA-256: c29a18086566223b20d30c49a862d8dfc920a7a6c3a1dd8381a25edb77c615ea

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