Malicious PDF — malware analysis report

Static analysis result for SHA-256 6affc8647cdc3d2d…

MALICIOUS

PDF

33.5 KB Authoring application: OpenOffice.org
MD5: c6641705ba5b592ec9b934ccc317c7f3 SHA-1: 5d2f2d0fedd7f1c0d3f0ab5bcc82909cffe92a7f SHA-256: 6affc8647cdc3d2d37d51b4bd526595746caa0ec78416d8c24676cf4bfec5c87
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of embedded external links to other PDF files. This behavior is indicative of a link farm or a method to distribute malicious content under the guise of legitimate-looking documents. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

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://soloinsurancequotes.com/uploads/1/3/0/5/130543771/leperupezewajuzowoba.pdf
    • http://www.dogeatdogstunts.com/uploads/1/3/0/5/130551188/wakepexizap_rusexebawofax_lofepivusivi.pdf
    • http://www.virtualizationvelocity.com/uploads/1/3/0/6/130639051/zizaf-gufelakijovupo-rezoref-sipugo.pdf
    • http://simplybiblestories.net/uploads/1/3/0/7/130739853/2331075.pdf
    • http://envythebrand.com/uploads/1/3/0/5/130589072/xekojixumusag.pdf
    • http://cpanel.maplepta.com/uploads/1/3/0/3/130313010/fujinoxe_sepibona_vobekif_lunowasukugi.pdf
    • http://skywarnforum.com/uploads/1/3/0/2/130271051/lifimani.pdf
    • http://honeycombbooks.org/uploads/1/3/0/6/130620924/a867ff17.pdf
    • http://questbusinesses.com/uploads/1/3/0/8/130813781/kugozegijinat_gateroxabovari_purasutuda.pdf
    • http://cgrisanti.org/uploads/1/3/0/3/130313274/c22ae9b4a6152ca.pdf
    • http://www.hemnnhaw.com/uploads/1/3/0/8/130874359/130874359.html#gmat+reading+comprehension+how+many+questions

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ce2.bin
31cd90257af6cbdd736ad5e597960a782c01c98f613a24f58363edd8d6c2b8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE2 7864 bytes

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