Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5426d27f97b0c8d…

MALICIOUS

PDF

33.3 KB Authoring application: SWFTools
MD5: ef4d55f8ef7d96a61e0183b81347f2ca SHA-1: 9b374be6b0b03fa8530f5e4ad0ec502545ebc3f3 SHA-256: f5426d27f97b0c8d95dfbb8d524280de060fd94f6c5e9d7ca0fc112b3b2bb808
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, and the document body was heavily obfuscated, but the primary malicious activity appears to be the mass linking.

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://marsjoy.com/uploads/1/3/0/6/130621477/radinudexorukaxese.pdf
    • http://aziragroup.com/uploads/1/3/0/2/130271232/4809088.pdf
    • http://neverwait.life/uploads/1/3/0/7/130775288/738c5194d201cc.pdf
    • http://cagedchicken.com/uploads/1/3/0/6/130639665/6388119.pdf
    • http://beyogaonline.com/uploads/1/3/0/3/130379063/wajod.pdf
    • http://abrolhoslandscaping.com.au/uploads/1/3/0/2/130272848/kogapoxuroxaxo.pdf
    • http://tamarackcreekoutdoors.com/uploads/1/3/0/5/130589108/nalazafukuvamino.pdf
    • http://hushfunky.com/uploads/1/3/0/5/130588437/9197826.pdf
    • http://laurenmichaels.net/uploads/1/3/0/6/130604530/3546246.pdf
    • http://cre8.work/uploads/1/3/0/6/130620627/lesazazanokew.pdf
    • http://www.panoramic-hoteliguazu.com/uploads/1/3/0/7/130739593/672f1b.pdf
    • http://lytness.com/uploads/1/3/0/5/130550966/8028874.pdf
    • http://michanti.com/uploads/1/3/0/6/130639147/xujab.pdf
    • http://okanaganjetriders.ca/uploads/1/3/0/7/130738951/vuziwokigi.pdf
    • http://tableheroes.com/uploads/1/3/0/4/130476062/sigepelisanox.pdf
    • http://mapamls.com/uploads/1/3/0/4/130435570/9186956.pdf
    • http://inkofficial.com/uploads/1/3/0/2/130272336/dabumutaxoge-tebezaz.pdf
    • http://animeconcarne.com/uploads/1/3/0/7/130775032/mugariwilimuwo_toxurifemowepek_gilapor_jisod.pdf
    • http://hb9uksyu.brdge.org/uploads/1/3/0/4/130488832/130488832.html#oceans+%28where+feet+may+fail%29+piano

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000236a.bin
40b13dbb23b0461b3bb0bf8427746b530fdd88fd1906d0d9d3320ab93f98b76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x236A 8200 bytes

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