Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb573dd64fc5478c…

MALICIOUS

PDF

45.6 KB Created: 2020-06-16 22:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3d510a97288d753e36ebb36e53bba90a SHA-1: 1bf83f0de323dffa14afddb2443816aea3503c80 SHA-256: eb573dd64fc5478c73e7f5995f1b63a905c128a6ac30d12fc4234b405b4c9eeb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm designed to distribute malicious content or harvest credentials. The document body, though partially corrupted, suggests a lure related to an 'operational policy manual'. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rpgd.stefanaarnio.com/uploads/1/3/0/7/130738861/130738861.html#wsib+operational+policy+manual PDF link annotation
    • http://mail.maryhamilton.us/uploads/1/3/0/6/130604958/d297d33ada.pdfIn PDF document text
    • http://christylive.com/uploads/1/3/0/6/130604838/3763382.pdfIn PDF document text
    • http://citytourdeals.com/uploads/1/3/0/4/130488574/415eb44b27.pdfIn PDF document text
    • http://cyberliabilitypro.com/uploads/1/3/0/7/130740180/4468394.pdfIn PDF document text
    • http://theprofessionalmother.org/uploads/1/3/1/3/131380901/rigipo.pdfIn PDF document text
    • http://realty4d.com/uploads/1/3/0/7/130738975/kutexigemudo.pdfIn PDF document text
    • http://www-host.alastairadams.co.uk/uploads/1/3/0/7/130740320/reririb.pdfIn PDF document text
    • http://radioavan.com/uploads/1/3/0/4/130476539/5676b3053.pdfIn PDF document text
    • http://macrotopia.com/uploads/1/3/1/3/131398182/5429502.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 5216 bytes
SHA-256: 21b75040cb27ee5c0eb0944ed556d6132b33a05e2389e34961efe323d90ec7cb
font_01_sfnt_off0000846a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846A 10688 bytes
SHA-256: ecbeebde90fa6fb5cc8987c80b954ae9321554a7be472bbc834959f7971a5295

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