Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2273e487c2da3d3…

MALICIOUS

PDF

44.1 KB Authoring application: Solid Converter PDF
MD5: e6297997802f50ad7f2bfbb0c4833541 SHA-1: 24d0989f03eb951581ad988f78d57b22ab6aa814 SHA-256: a2273e487c2da3d3d2421918190cd805a225fca1bb2cf096eead0ee8ab32ad98
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The document body, though heavily obfuscated, contains references to fight videos and links to external PDF files, suggesting a lure to drive traffic to these sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ardmorevetservices.com/uploads/1/3/0/3/130379243/049a8.pdf
    • http://septictankpumpinggwinett.com/uploads/1/3/0/5/130546196/nifavefexap.pdf
    • http://miniturecowboysrus.com/uploads/1/3/0/2/130272548/2683000.pdf
    • http://oreficeltd.weebly.com/uploads/1/3/0/2/130288579/4454814.pdf
    • http://ne-surgerycenter.net/uploads/1/3/0/6/130604588/130604588.html#yuri+boyka+all+fight+video

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000059ea.bin
a89e0d74f4760aa6d952e8a0f565f11ae09e20817b9dea00b1dd82f71f8193a5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x59EA 20444 bytes
font_00_sfnt_off00000fe6.bin
8c7e696d7566aab7a8311e99b35b33991308dbe55927f9641351135288a0e997		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6 8100 bytes
font_01_sfnt_off00004148.bin
afc341d065f2212550cbc9ed5592ad422bfb6486d9a3a317b7cd9dc368a9ce38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4148 10612 bytes

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