Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd64bfc51f742d2…

MALICIOUS

PDF

76.0 KB Created: 2021-01-10 02:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bea35633a0d2267485d04de5c736a447 SHA-1: c9cfd458d3c6b9d93bf2f97101c4014118be1a35 SHA-256: cfd64bfc51f742d207349d303cee9ebd6c6e16a1f0bbc7a52ce30cdd276dc5a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing lure. The document body, though partially corrupted, suggests a 'beneficiary designation form' to trick users into clicking embedded links. The presence of numerous links to disposable hosting services further supports a phishing or link-farming attack pattern.

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://traffking.ru/aws?utm_term=beneficiary+designation+form+401k+retirement+account PDF link annotation
    • https://site-1177836.mozfiles.com/files/1177836/vutibagaduropisixu.pdfIn PDF document text
    • https://site-1175642.mozfiles.com/files/1175642/laxedin.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/27586696941.pdfIn PDF document text
    • https://site-1230881.mozfiles.com/files/1230881/23842275682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5f9afe6d2de67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_5f8ea34541b24.pdfIn PDF document text
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/kimufe.pdfIn PDF document text
    • https://site-1206710.mozfiles.com/files/1206710/guxusabixij.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/7105af2e2c7.pdfIn PDF document text
    • https://nowigusoludi.weebly.com/uploads/1/3/4/2/134266380/d708c7f7d0961c7.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/mazejomur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f882f9534d0c.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5804 bytes
SHA-256: 732c98cb401e0fa951f355ff74a421a1d028609c2da32aae4374c9831479eaea
font_01_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 10604 bytes
SHA-256: 5ecf1114809aca0fbdd9a65247316f3653280935b0cbe7fd065b8c75ee6063f3

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