Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fcbd39c1d337fe…

MALICIOUS

PDF

39.2 KB Authoring application: LibreOffice
MD5: fadb550a71a2c3c8f09e602f8c552fb4 SHA-1: acfc812e2beab2277afd5f4bff1499d1082ad7c0 SHA-256: a8fcbd39c1d337fef3b0e91bac360730b33489d6edb03f0c66575c1a07fd532e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This technique is often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware distribution via a link farm.

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://mrfeed.org/uploads/1/3/0/3/130313854/207076c4f08.pdf
    • http://www.esrenovate.com/uploads/1/3/0/3/130379058/2953751.pdf
    • http://catching-nature.com/uploads/1/3/0/5/130551558/wiketibi-kisekosa.pdf
    • http://mobowlusa.com/uploads/1/3/0/7/130739499/3497332.pdf
    • http://dictionary-of-regional-english.com/uploads/1/3/0/3/130313383/1163001.pdf
    • http://volunteerfocus.com/uploads/1/3/0/4/130435597/navuv.pdf
    • http://www.marissacamper.com/uploads/1/3/0/8/130874120/481290.pdf
    • http://carolinegadsby.com/uploads/1/3/0/7/130739729/bawinid_legepewage_xawotujubimez_zimofez.pdf
    • http://beasknees.com/uploads/1/3/0/4/130490451/6276693.pdf
    • http://rivelazioniprivate.org/uploads/1/3/0/7/130775918/9370771.pdf
    • http://sustainabilitybusinesscase.com/uploads/1/3/0/6/130620478/4083959.pdf
    • http://lakehomemag.com/uploads/1/3/0/7/130775510/zomipotubu.pdf
    • http://newyorkcityspeechtherapy.com/uploads/1/3/0/4/130489830/nixigudikoz-rotilokoliwuxi-lemeluk.pdf
    • http://danielgordon.com/uploads/1/3/0/5/130551971/9489705.pdf
    • http://intelisched.com/uploads/1/3/0/6/130620927/xizorefegagisax.pdf
    • http://llxprogram.com/uploads/1/3/0/8/130873906/b79c3d8.pdf
    • http://spindoctorspromotions.com/uploads/1/3/0/4/130476148/2f343dc9244.pdf
    • http://kyflowernseed.com/uploads/1/3/0/7/130776252/130776252.html#acute+kidney+failure+dog
    • http://spindoctorspromotions.com/uploads/1/3/0/4/130476148/2f343dc924

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003be7.bin
3eae04da3cad66d9da2bdcfff31ef493dcb22c91584f4311866ff8035ec8ebcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE7 8220 bytes

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