Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cf2431bc4f0b14…

MALICIOUS

PDF

73.3 KB Authoring application: SWFTools
MD5: 27cf945be8bdf238ba697473c9b87717 SHA-1: 036284948e60e3477a42fce615cdd6fbe6e75120 SHA-256: f0cf2431bc4f0b144dcb005ad84ff14c3ee75c8c84ce12898618973e6554750e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign, designed to drive traffic or potentially distribute further malicious content. The ClamAV detection and ML classifier strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nextanityradio.com/uploads/1/3/0/6/130604028/2688404.pdf
    • http://ps110k.com/uploads/1/3/0/5/130543569/mosixewiba.pdf
    • http://mrsmishra.ca/uploads/1/3/0/6/130604166/ziravalaxopu.pdf
    • http://shelfstalker.net/uploads/1/3/0/2/130289732/redivotezeluxif_xumojutepitikil_bizakolizumiza.pdf
    • http://dymovenok.ru/uploads/2020/01/29/2025547.pdf
    • http://weefca.com/uploads/1/3/0/5/130545429/jadowivat.pdf
    • http://laurenkwatson.com/uploads/1/3/0/5/130551468/gotepujuz_lazefu_wexijomegapanow_vijosax.pdf
    • http://bayesianupdate.com/uploads/1/3/0/3/130323555/649a5ff9.pdf
    • http://dynamicsymmetryart.com/uploads/1/3/0/3/130313557/2e60fbd04c905.pdf
    • http://partisanrecords.net/uploads/1/3/0/5/130589345/kanuwenuraxok.pdf
    • http://myslickpic.com/uploads/1/3/0/6/130604488/d426451b.pdf
    • http://stavrias.com/uploads/1/3/0/5/130548152/luzakejeto-kewolawu-zesem.pdf
    • http://5pointauto.com/uploads/1/3/0/2/130288932/130288932.html#star+wars+complete+locations+2016+pdf

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012e8.bin
3b4101a1ba1117cc326726c4296eb702696460068eb50b47e282fbaa7fc2be5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8 11612 bytes
font_01_sfnt_off0000b258.bin
ef86ce25c4e755d0c6e7dbe5e7f608166ab083dadec5ee1592cac02839f6b7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB258 4988 bytes
font_02_sfnt_off0000c348.bin
5a280dbab8333246b2ad75ded8c6a7e7047cd4279cb72a17d438e90658b1b647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC348 20412 bytes
font_03_sfnt_off0000e4f7.bin
a97838f8fd90aa0a4b43b453f1edd36ddc88d9e1251d2a81d73ad818cfbf593f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 2680 bytes

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