Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5f6e0d7830157d…

MALICIOUS

PDF

50.5 KB Authoring application: Adobe PDF Library 9.0
MD5: eb04050ace22ccf835cf6875d103e2e2 SHA-1: 8b801b2f947cce681a892ea3b2886b98d02b1cc1 SHA-256: 4c5f6e0d7830157da221d9d46e42f01c10caffad036f8c9a61e45d3b2c05039f
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule, indicating a large number of external links. The ML classifier also strongly indicated maliciousness. The embedded URLs point to a network of domains that appear to be part of a link farm, suggesting a phishing or malware distribution scheme. No scripts were extracted from this sample.

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://microtex.limited/uploads/1/3/0/6/130639365/gijopo.pdf
    • http://aedutah.com/uploads/1/3/0/5/130590469/sozojitowadiri-zufozupid-forajalan.pdf
    • http://a-aon.com/uploads/1/3/0/4/130483647/4550648.pdf
    • http://princessponyclub.com/uploads/1/3/0/2/130287500/d6dec745fb646d.pdf
    • http://luckycoinproductions.ca/uploads/1/3/0/4/130436521/fitawepud.pdf
    • http://academictranscripts.com.au/uploads/1/3/0/6/130621829/wufidetasixel.pdf
    • https://tovozowi.weebly.com/uploads/1/3/0/4/130476390/b0dfd5fbf3.pdf
    • http://mountainandocean.org/uploads/1/3/0/7/130739088/130739088.html#anari+movie++tinyjuke

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000131c.bin
e8caf72d7b3e82f2ef26b36402804d09631350bd470b16e0e0ab78fa09f96d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C 8532 bytes
font_01_sfnt_off00007d57.bin
cda91c0a3bc2c0775e391014e6d8312c887bcbaba3cd6482e17ad09434465803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D57 16800 bytes

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