Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd45a9e369cddfd…

MALICIOUS

PDF

69.9 KB Created: 2021-02-05 05:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: efd5dd70ca4f6aa278af5aed2aca4411 SHA-1: dfe486b66c13a917270d1a752e29f568439e4f47 SHA-256: acd45a9e369cddfd9ce78de481c654eda3e294956c40fd1ebda7ccf44270903b
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/aws?utm_term=lorien+timesheet+portal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fd13e406e39a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_5fdc6e7d05504.pdfIn PDF document text
    • https://rijagadufe.weebly.com/uploads/1/3/1/6/131606992/gofudoxefe.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/vebamawuxeguvetokuf.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/5350265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600cf57d0936f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402960/normal_600600a9cebf1.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/7582486.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/4772002.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495839/normal_5fed458b97669.pdfIn PDF document text
    • https://nufawufaza.weebly.com/uploads/1/3/0/7/130740177/5ec148.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/2892057.pdfIn PDF document text
    • https://wewodagib.weebly.com/uploads/1/3/4/2/134266566/biwetiwudovow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_601487dc28979.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377662/normal_5feb49fcea2c0.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/sumesawoxajew/wiliwug.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/zopunanu.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/11048917905.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_off0000d36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36F 5000 bytes
SHA-256: 7c56f9c2e7cd9ea69bb9de8eae11bd6b9b1863428fc2ac71e15a3376a8f845b8
font_01_sfnt_off0000e440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE440 11308 bytes
SHA-256: 2f4c4630f45274f4b36be6646a7a1de0bd26a674f6ee5749139786fa9acec17c

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