Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fec59430e7465c…

MALICIOUS

PDF

38.6 KB Authoring application: PDFedit
MD5: 0ec9622b593c5b498802afd4180506e7 SHA-1: 626fdc918b28382846cf31dbc7a7acb35709bb6d SHA-256: 58fec59430e7465c23475b9d0b193cd08ea5ff3dc125c4daeb5155067a3447c6
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://remsofflorida.com/uploads/1/3/0/7/130776401/9641f0922d.pdf
    • http://cmqi.com/uploads/1/3/0/6/130620429/punilovigulube.pdf
    • http://unlazoenmovimiento.com/uploads/1/3/0/6/130604864/kiwadu_bukiw.pdf
    • http://andreahorton.com/uploads/1/3/0/8/130814382/jetikivitomare.pdf
    • http://splintergeneration.com/uploads/1/3/0/4/130483303/10727c3cb.pdf
    • http://kathrynjacksonart.com/uploads/1/3/0/6/130639916/pofomagudezu.pdf
    • http://ocalsports.com/uploads/1/3/0/7/130775386/5866110.pdf
    • http://hostmaster.figurefourfilms.com/uploads/1/3/0/4/130436094/kekiraxapobavijuf.pdf
    • http://iamaloe.com/uploads/1/3/0/6/130605206/kuwij_pubilimigule_nizifedib_xelixur.pdf
    • http://www.eightytwentysalestraining.com/uploads/1/3/0/6/130605118/8323635.pdf
    • http://webmail.aurorahw.com/uploads/1/3/0/6/130620797/xadifakupi-pafejovoz.pdf
    • http://www.responsiblysourced.co/uploads/1/3/0/6/130639814/8561134.pdf
    • http://sacworkandtravel.com/uploads/1/3/0/6/130603937/tilaromemexefufog.pdf
    • http://tcgsue.com/uploads/1/3/0/6/130621874/6145222.pdf
    • http://sales12-sip-phone.pleasingfood.com/uploads/1/3/0/2/130289226/130289226.html#abcd2+score+after+tia
    • http://cmqi.com/uploads/1/3/0/6/130

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003044.bin
78116880e9c902c31767bfa12a9ff84ada309181a52ab1aa29cdf6fbfe115b45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3044 2600 bytes
font_01_sfnt_off00003bf7.bin
720e10854c457f82706da6c197c050a94ca396409641e9edbf5da7d765f3e6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF7 8228 bytes

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