Malicious PDF — malware analysis report

Static analysis result for SHA-256 139f7dd78596ce29…

MALICIOUS

PDF

63.5 KB Created: 2020-03-16 18:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c2731ef70c97ad0a05f55068d3aa7f48 SHA-1: 46b582d8707e9a4e73f895ab8667cbe41e42aa94 SHA-256: 139f7dd78596ce29f393d83c312f427fd20a61e035ac03540a27800a52824d4a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm or redirection scheme.

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://detectiveagence.com/uploads/1/3/0/7/130740046/130740046.html#heart+of+darkness+narrator
    • http://blancapeakdentalcenter.com/uploads/1/3/0/5/130545334/muzadux.pdf
    • http://mx.elementandvibe.com/uploads/1/3/0/5/130588588/1ad3eae10.pdf
    • http://surtimportaciones.com/uploads/1/3/0/4/130490053/romolalakukanuzuloli.pdf
    • http://www.mundfordconnect.com/uploads/1/3/0/6/130603884/sixebevivepale-xigir.pdf
    • http://kimchibabe.com/uploads/1/3/0/5/130550882/juzaj.pdf
    • http://firstviet.com/uploads/1/3/0/6/130621965/risegilep_pederaw_luwowakubafut.pdf
    • http://roadworthee.com/uploads/1/3/0/6/130620674/3c1491889b785.pdf
    • http://bucketlistbooks.co.uk/uploads/1/3/0/6/130620275/kuwilujinage.pdf
    • http://metalgiftideasandmor.com/uploads/1/3/0/2/130272406/lusiwirifered.pdf
    • http://essemmevents.net/uploads/1/3/0/4/130476045/bc17a5833d.pdf
    • http://repiping.net/uploads/1/3/0/4/130475925/sebomofebibubakapog.pdf
    • http://stain-goed.nl/uploads/1/3/0/5/130542852/3695710.pdf
    • http://skinnytiffy.com/uploads/1/3/0/6/130604564/46dfcb3.pdf
    • http://neighborhoodinvolve.org/uploads/1/3/0/6/130621656/gevetenixebago.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee5.bin
48a6f2880f4ef4c9792256e42cccedb32f268b6bb98f2f70418a0e26e8522de3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE5 9196 bytes

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