Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0ab2cb234cc476…

MALICIOUS

PDF

36.1 KB Authoring application: Nitro PDF
MD5: 994fdc7b75af779868959b7012ea79fb SHA-1: 5ab9665177f1f70a6c9b30c104860d254abed0c0 SHA-256: 1c0ab2cb234cc476afb99ad9f386748cbfa4154c1f3c0356c374d1d3f4bca915
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This "link farm" technique is commonly used to distribute phishing content or redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware delivery campaign.

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://lampeelife.com/uploads/1/3/0/8/130813738/zudobit_wanavitu_lononum.pdf
    • http://ayushisen.com/uploads/1/3/0/6/130639428/1001703.pdf
    • http://metrobytes.com/uploads/1/3/0/3/130379351/2bc8bc9793c52.pdf
    • http://boldercredit.com/uploads/1/3/0/7/130740256/4075367.pdf
    • http://countyturfpro.com/uploads/1/3/0/6/130639876/6583481.pdf
    • http://ryeontheroad.net/uploads/1/3/0/3/130312952/luworigu.pdf
    • http://durhamyouthprograms.org/uploads/1/3/0/5/130588913/mexax.pdf
    • http://radiodagen.nl/uploads/1/3/0/5/130589252/9c51b2350.pdf
    • http://mgeducation.net/uploads/1/3/0/7/130739284/8944386.pdf
    • http://ctatherapy.com/uploads/1/3/0/4/130483520/kizuwowukujura-rixekisamutawif-refixif.pdf
    • http://mobilhomebluesky.com/uploads/1/3/0/5/130550775/mujuzirokanux-mabibulidowuxaw-mivuvolemusas-mupijukin.pdf
    • http://doug-jones.com/uploads/1/3/0/5/130588328/2169723.pdf
    • http://casperoilfield.com/uploads/1/3/0/3/130379232/gotifilol_risesove_ripumav_movabarodizegu.pdf
    • http://lists.accordionapocalypse.com/uploads/1/3/0/6/130640081/130640081.html#genetic+algorithm+examples+problems

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ae.bin
d4fb985f13132d992ba4c8b08c1e23de9a06a0f9e4e64fa9195fb27ee80d90f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AE 8064 bytes

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