Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1855faae2734779…

MALICIOUS

PDF

69.2 KB Created: 2021-02-13 13:37:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6cdfea7df39d9d654c8bb4d97c2addfe SHA-1: 839cbe05988d1b11dc7aceec96aabc27d7c6d36b SHA-256: c1855faae27347795cb8773c242988002345d446706761429101764e08b1d2a7
186 Risk Score

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://druttle.ru/wix?keyword=18+wheels+of+steel+american+long+haul+car+mods PDF link annotation
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/zesufelasedepeladew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_6027913b3c515.pdfIn PDF document text
    • https://vorujefam.weebly.com/uploads/1/3/4/3/134322124/b76a48097b664f3.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/12919476f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_601bde971d408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_601359c3d85c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5fc9d7494daae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378164/normal_5fcdc39712c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_600f76839e14a.pdfIn PDF document text
    • http://barashik.space/open_video_photormi75.pdfIn PDF document text
    • http://gatorama.fun/dupejolilezaguvyw0w.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/tugabijenovili/famog.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/tokimujubazux.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_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 5680 bytes
SHA-256: 500f56d22223edfe35ffccf2c419b21e35f0bc4959f0ab1d5ac3a51beeaa8716
font_01_sfnt_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 10428 bytes
SHA-256: e5d4734fc53399643c1a5fcfc1945fe88de41c0cff81fdb3a28e015a39476b0a