Malicious PDF — malware analysis report

Static analysis result for SHA-256 da78fc5b7dd27aa1…

MALICIOUS

PDF

39.7 KB Authoring application: Adobe PDF Library 9.0
MD5: e5210b936784e323a2088ae7b6a57d56 SHA-1: 71f2f7bba89f862a530adce324256c554aff21df SHA-256: da78fc5b7dd27aa1122b071da9c6a39d110224ab993cbc9f46072062e04bc063
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to potentially malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing or traffic-generating malware.

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://teamjaime.com/uploads/1/3/0/6/130639882/nemelakamorajamurim.pdf
    • http://debbiesdynamicdesigns.com/uploads/1/3/0/2/130273576/xewesagagajix.pdf
    • http://essteamlab.com/uploads/1/3/0/5/130590717/bixebimizagaf_lotosiwise_ditopet.pdf
    • http://rejuvenatemedical.co.uk/uploads/1/3/0/6/130639896/7000b0aebc.pdf
    • http://michaelronaldblake.com/uploads/1/3/0/5/130540493/1604812.pdf
    • http://bnaiisraelnc.com/uploads/1/3/0/7/130739864/2466141.pdf
    • http://realestatecareerjacksonvillenc.com/uploads/1/3/0/5/130590278/42f2c82.pdf
    • http://darkmediaguy.com/uploads/1/3/0/4/130435787/e5d0d387e0e.pdf
    • http://ultracooltrends.com/uploads/1/3/0/6/130621142/gezujajoviw.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/5/130589131/130589131.html#bioecological+theory+microsystem

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001203.bin
5d7a0a7b599cfc227b0dd5e7522ff9b4bb345aa44f07f26fe863971bde54ba02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1203 7932 bytes
font_01_sfnt_off0000603d.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x603D 2616 bytes

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