Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d9334df75e7755…

MALICIOUS

PDF

84.0 KB Created: 2020-05-30 18:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 644bd122874666e9feb5e8bef4df7951 SHA-1: cefa02db64c3db7cec510592ae8c7a3ba7d2373e SHA-256: f3d9334df75e77551e78baa1aa806dd9604a293e9f34ce4ded941c828f15db85
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to PDF files on unrelated domains, suggesting a link farm or redirection tactic. One of the embedded URIs, http://webmail.carmichaelnl.com/uploads/1/3/0/5/130547624/rovulide_gubazituxupowas.pdf, is presented as a 'john deere l 130 manual' to entice clicks. No scripts were extracted from this sample, limiting the analysis of direct malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 4

  • 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.
  • 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 http://webmail.carmichaelnl.com/uploads/1/3/0/5/130588842/130588842.html#john+deere+l+130+manual PDF link annotation
    • http://watervilleyouthsports.com/uploads/1/3/1/4/131483155/71a0b154.pdfIn PDF document text
    • http://natalywickham.com/uploads/1/3/1/3/131398425/firobavosaxar.pdfIn PDF document text
    • http://beeidentification.com/uploads/1/3/0/2/130289430/8122391.pdfIn PDF document text
    • http://squeekycleen.net/uploads/1/3/0/4/130436028/6226532.pdfIn PDF document text
    • http://hippiecafestore.com/uploads/1/3/0/5/130547624/rovulide_gubazituxupowas.pdfIn PDF document text
    • http://afterlifetvnetwork.com/uploads/1/3/0/5/130588503/fupijafasoropex-lusegopaki.pdfIn PDF document text
    • http://ambiencecleaningaustralia.com/uploads/1/3/1/6/131637362/xidodej.pdfIn PDF document text
    • http://bonespublicauction.com/uploads/1/3/0/9/130969608/7383414.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 11416 bytes
SHA-256: c584e3fa9c74fa8e3f0e2229dcee100e953659e714c972d7431314a9a48cfaab

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