Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35d6d33ce5c2312…

MALICIOUS

PDF

39.0 KB Created: 2020-03-29 22:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2bab12cd323e54c6345fe7ca909fac5 SHA-1: 437f1c345e52d2dd7526b27e22107ad39ab7a4c7 SHA-256: c35d6d33ce5c23128f2fe5968de17fea99f8064d88851fc773e57b8fe8667687
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO poisoning technique, designed to drive traffic to potentially malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://qualitycareafh.com/uploads/1/3/0/4/130489841/130489841.html#garmin+rv+760lmt+user+manual
    • http://hondaprogramcars.com/uploads/1/3/1/0/131070371/zoxofusesesisazijawo.pdf
    • http://perpetualpossibilitiesorg.com/uploads/1/3/0/2/130272420/povatoraxaf.pdf
    • http://betterjunglewins.com/uploads/1/3/0/7/130739633/xodilirojumimemete.pdf
    • http://www.cmjlawn.com/uploads/1/3/0/4/130476143/goxotekutupageres.pdf
    • http://trevenastyles.com/uploads/1/3/0/3/130379409/26cdcc.pdf
    • http://clyderatliff.com/uploads/1/3/0/2/130270845/244bb1b130cf.pdf
    • http://dougzanderart.com/uploads/1/3/0/6/130621686/jagipumenakixuxoka.pdf
    • http://livenation.implementation.collectivehealth.com/uploads/1/3/1/4/131437299/8587979.pdf
    • http://rustixcustommetalfabricationllc.com/uploads/1/3/0/6/130620341/gilopepoget.pdf
    • http://lawfirmmarketingguy.com/uploads/1/3/0/7/130738956/vutex-lebexiwizuvof-mefux.pdf
    • http://siobhansharkeycounselling.com/uploads/1/3/0/8/130874633/6698387.pdf
    • http://toyfactoryfab.com/uploads/1/3/0/5/130538946/rifut_vugiba_magitarar.pdf
    • http://dddnamibia.net/uploads/1/3/0/2/130287242/bad57b9a.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_off00006d52.bin
fc48d590465e45a967dff5344cb91eed5929b61406c896f77a93d90eddbcb6b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D52 8984 bytes

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