Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38281cb17c7a8d9…

MALICIOUS

PDF

28.6 KB Authoring application: Mobipocket Creator
MD5: aad0c6236afd0fa68e90d114ab145295 SHA-1: 2189cbbfbfa8ff0ff705db4ed0a415485e3856bf SHA-256: f38281cb17c7a8d9296359919ce70becaa96341f8c33bcc07d6dd39a5b21f99b
150 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary indicator is the presence of a large number of embedded external links, identified as a PDF SEO link farm. These links point to various PDF files hosted on different domains, suggesting a coordinated effort to distribute content or manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://mail.therapeuticumdejavue.com/uploads/1/3/0/7/130776641/lavotadurizidagixila.pdf
    • http://www.cg-design.eu/uploads/1/3/0/4/130490115/7d067f22.pdf
    • http://bnbmarin.com/uploads/1/3/0/5/130539432/kumomadifo_zalabe_jufujinimik.pdf
    • http://www.richmansburdenthefilm.com/uploads/1/3/0/8/130814636/7250019.pdf
    • http://nexacreativeconsulting.com/uploads/1/3/0/4/130476263/1348494.pdf
    • http://noreencoupenpleinair.com/uploads/1/3/0/3/130323290/4902951.pdf
    • http://www.gillenpromedia.com/uploads/1/3/0/6/130640146/8267933.pdf
    • http://www.knightsofcheshireltd.co.uk/uploads/1/3/0/2/130272877/677c8.pdf
    • http://chuckwilkins.com/uploads/1/3/0/5/130551764/guzuzorat_tujumuvubuvitag_zabefigavuk.pdf
    • http://coverofblue.com/uploads/1/3/0/5/130551920/wodenepexabog.pdf
    • http://www.theniktionary.com/uploads/1/3/0/3/130379193/3501164.pdf
    • http://dalestravel.info/uploads/1/3/0/2/130289292/34bf6869.pdf
    • http://janegreen305.com/uploads/1/3/0/7/130739154/184b382abdcd4bd.pdf
    • http://dotbu.org/uploads/1/3/0/4/130478261/5281545.pdf
    • http://sjonathanphilip.com/uploads/1/3/0/3/130313091/1734850.pdf
    • http://mta138.qualitynow.net/uploads/1/3/0/4/130477945/kejupiduve.pdf
    • http://txpublicschoolproud.com/uploads/1/3/0/5/130551957/porakuwowopuso_sudidolegofu.pdf
    • http://thismaycomeinhandy.com/uploads/1/3/0/4/130476703/130476703.html#another+brick+in+the+wall+fingerstyle+tab

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016a5.bin
e73fd673b15715a2f2427f4cac97511fe5bcf1bc6e6e4a84798ae61a59e5c505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5 6408 bytes

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