Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9008c400387e6d5…

MALICIOUS

PDF

39.8 KB Created: 2020-05-22 00:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: d90cb52b6fdef272d259759ad6b9586d SHA-1: 017b519c6c41b6f13b736a814fc0546d15d23545 SHA-256: b9008c400387e6d575377d92595239081423eeb9017edb6366b4fbafa471719d
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a PDF SEO link farm. The ML classifier strongly indicated maliciousness. The primary purpose appears to be directing users to a multitude of unrelated websites, likely for malicious SEO or to host further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://paper-trail.co.uk/uploads/1/3/1/4/131407592/131407592.html#swtor+same+gender+romance+guide PDF link annotation
    • http://spirit-at-ease-art.com/uploads/1/3/0/7/130739944/5c31d.pdfIn PDF document text
    • http://wfgrainmakers.net/uploads/1/3/0/5/130588784/1225226.pdfIn PDF document text
    • http://toxinscreen.com/uploads/1/3/0/5/130551073/doxarazilunopaxemi.pdfIn PDF document text
    • http://thesecretgolfer.com/uploads/1/3/1/4/131437216/tafaza.pdfIn PDF document text
    • http://sellshousefast4cash.com/uploads/1/3/0/3/130379517/bc961f7f2f2d54.pdfIn PDF document text
    • http://apengineeringworks.net/uploads/1/3/1/3/131383580/21920c2e.pdfIn PDF document text
    • http://rumbleandresist.net/uploads/1/3/0/6/130639443/zekasibewa.pdfIn PDF document text
    • http://carlospark-playablanca.com/uploads/1/3/0/5/130551749/4630798.pdfIn PDF document text
    • http://gems-wedding-and-events.com/uploads/1/3/1/4/131407547/nagure.pdfIn PDF document text
    • http://bombshellbeautyaz.com/uploads/1/3/1/8/131858043/3fad8f9d4acb772.pdfIn PDF document text
    • http://stockholmtownship.com/uploads/1/3/0/4/130436139/pavubiva.pdfIn PDF document text
    • http://apt17.com/uploads/1/3/0/6/130639535/turejaduraxeli_zexemigiriviz_raliz_lusizine.pdfIn PDF document text
    • http://borncorporate.com/uploads/1/3/1/4/131482976/logidowederokadu.pdfIn PDF document text
    • http://copewithcancer.net/uploads/1/3/0/7/130739197/b435ece5c6983e.pdfIn PDF document text
    • http://franceswatkinsartist.com/uploads/1/3/0/6/130639808/a04d4.pdfIn PDF document text
    • http://bazzos.net/uploads/1/3/0/6/130621892/juvuf.pdfIn PDF document text
    • http://saveonecent.com/uploads/1/3/1/6/131606875/ferufemasewigi.pdfIn PDF document text
    • http://osteopathe-animaux-oise.com/uploads/1/3/1/0/131069970/pikesomusokotal_famazajumipupan_jorekekipew.pdfIn PDF document text
    • http://howtocleanacomputer.org/uploads/1/3/0/5/130539287/tisudexorerixefesug.pdfIn PDF document text
    • http://byronequineassistedlearning.com/uploads/1/3/1/6/131606719/7503029.pdfIn PDF document text
    • http://mikesrefinishing.com/uploads/1/3/1/6/131607889/deten.pdfIn PDF document text
    • http://spectrumherniaclinic.com/uploads/1/3/1/6/131606807/805070.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 3

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_off00006f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F97 10492 bytes
SHA-256: 0354344e3d8c905aef9d45e90717abc22b64909bf38cf5ba545467a5f684fa38

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