Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86baad64216a6e7…

MALICIOUS

PDF

37.5 KB Created: 2020-06-08 09:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9f05e82f4d184866eb4c7cdcf8dcaf0 SHA-1: 107dd906e9f4474f5540e8d7801632d6b528bf78 SHA-256: e86baad64216a6e7c286dd0f596495ded93de239fbb900342bb2a58cfa4a2d84
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO spam campaign. The ML classifier also strongly indicated maliciousness. The document body contains metadata and URLs, reinforcing the link farm pattern. 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://scientopiadiscoverycenter.com/uploads/1/3/0/2/130274376/130274376.html#pelicula+de+barbie+completa
    • http://cpanel.chuskitchen.com/uploads/1/3/0/5/130590323/raleritozew.pdf
    • http://2kn.undesirable.us/uploads/1/3/1/4/131406669/zisovelinifepixu.pdf
    • http://parkourundervisning.dk/uploads/1/3/0/4/130489149/joluwu.pdf
    • http://cornerstoneministriesinternational.com/uploads/1/3/1/8/131856523/nemok-zubeboduxuxo-rugovate.pdf
    • http://academiacultural.pl/uploads/1/3/0/5/130590338/nalobon.pdf
    • http://fumeazaprost.com/uploads/1/3/1/3/131379394/3123166.pdf
    • http://inayalima.com/uploads/1/3/0/2/130273978/7924211.pdf
    • http://ashopintheclouds.com/uploads/1/3/1/4/131437276/4355502.pdf
    • http://gomakedisciplesministry.com/uploads/1/3/0/6/130605048/2594061.pdf
    • http://twig.faithbiblecamp.com/uploads/1/3/0/7/130739318/3832113.pdf
    • http://hostmaster.eastkentclassicmotorcycleclub.co.uk/uploads/1/3/0/5/130588999/6fd7cd60bf6d7.pdf
    • https://mizarexil.files.wordpress.com/2020/06/21199190180.pdf
    • https://mixanutiliba590569985.files.wordpress.com/2020/06/zefesimojapisuwani.pdf
    • https://zirazeru.files.wordpress.com/2020/06/velimebewaraf.pdf
    • https://mesazefa.files.wordpress.com/2020/06/64485144108.pdf
    • https://lejobujukik.files.wordpress.com/2020/06/16514550368.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005503.bin
721fde400d54a9c4f59b029f7b08237fe706b13dde309b53324966880cc95ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5503 4068 bytes
font_01_sfnt_off000064ae.bin
191d5f0bb28b0013f042f08d4e5cf8d303d5e1ddbec4e2033c887974dc45b7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 10796 bytes

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