Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c11c66be2a1136b…

MALICIOUS

PDF

58.1 KB Created: 2020-04-23 08:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 81386830938226344b4db7af261a13da SHA-1: f5d003d1636fa8b7090d95e887d557a3da975913 SHA-256: 3c11c66be2a1136b53fa46d4dc35261634b605ad3dd202cc1a7c922f4be0ed38
96 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm designed to obscure the ultimate destination or to artificially inflate search engine rankings. The primary lure appears to be a 'Vert shock workout pdf free' document, which redirects to a page containing more links.

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://designproinnovation.com/uploads/1/3/1/4/131409909/131409909.html#vert+shock+workout+pdf+free PDF link annotation
    • http://innerbeingbreakthrough.com/uploads/1/3/1/0/131071286/478644.pdfIn PDF document text
    • http://outlawyarns.com/uploads/1/3/0/6/130604355/bikunanesuxize_penifesama_rogakudebipera.pdfIn PDF document text
    • http://svie.info/uploads/1/3/1/4/131406108/zobizus_tegasizaguze.pdfIn PDF document text
    • http://oakdalepoolservice.com/uploads/1/3/0/9/130969506/3479385.pdfIn PDF document text
    • http://controlcompcostsnow.com/uploads/1/3/0/2/130289278/1850437.pdfIn PDF document text
    • http://amiracleconsulting.com/uploads/1/3/0/4/130492127/lifoxiwu-bizuwozusujul.pdfIn PDF document text
    • http://tennisbuddy4u.org/uploads/1/3/0/4/130483469/wureninanedi.pdfIn PDF document text
    • http://academyofgroove.com/uploads/1/3/1/6/131606284/4967b3f0c97d.pdfIn PDF document text
    • http://gracefullylovinggtseniors.org/uploads/1/3/1/4/131452839/tekugik.pdfIn PDF document text
    • http://yourgroupgetaways.com/uploads/1/3/1/3/131384374/zadogevomeve-romofu-xavudafuvul.pdfIn PDF document text
    • http://tampaoaksone.com/uploads/1/3/1/4/131453793/6630824.pdfIn PDF document text
    • http://lamosproductions.org/uploads/1/3/0/4/130435945/655c9e4db86.pdfIn PDF document text
    • http://walkerstitans.com/uploads/1/3/1/0/131070847/1714033.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off0000b0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B0 8360 bytes
SHA-256: cb5298291d5550f326f15c9abe85d6b810e5fb94f322421f6bbe5939545e90f8
font_01_sfnt_off0000d101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD101 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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