Malicious PDF — malware analysis report

Static analysis result for SHA-256 967d5f16092e9c41…

MALICIOUS

PDF

41.2 KB Authoring application: Adobe PDF Library 9.0
MD5: eb765647025d33bc34427c682caaecea SHA-1: 1c71a13f05f4ff125b1788a4f90ba4ce4777e64d SHA-256: 967d5f16092e9c410431c1c6c8bf0926d7fecb6b7ef5e31641c96709aa8c1b15
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also confirm its malicious nature. The embedded URLs are likely used to redirect users to malicious sites for phishing or to distribute further malware. The document body itself appears to be corrupted or contains irrelevant text, but the presence of numerous external links is the primary indicator of malicious intent.

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://charitytroutt.com/uploads/1/3/0/6/130621630/ca9ef7a4.pdf
    • http://hhwarehouse.com/uploads/2020/01/29/jekajekubaxamexubuda.pdf
    • http://wawujato.tvpays.online/uploads/2020/01/28/tojifet-tedalugex.pdf
    • http://themegahotspot.com/uploads/1/3/0/7/130776561/2124373.pdf
    • http://nationwidehealthgroup.com/uploads/1/3/0/5/130539843/86fcc44449.pdf
    • http://districtvba.com/uploads/1/3/0/7/130739139/welama.pdf
    • http://mommytimeindoorplay.com/uploads/1/3/0/2/130270997/6419584.pdf
    • http://christinawei.com/uploads/1/3/0/7/130775660/guzejemoweb.pdf
    • http://1169certified.info/uploads/1/3/0/5/130589454/3adb4f68b66.pdf
    • http://thebeadmusetx.weebly.com/uploads/1/3/0/6/130604427/73af81c.pdf
    • http://centreformindfulness.ca/uploads/1/3/0/4/130435684/sokagisevafatifikuga.pdf
    • http://thedonald2020.co/uploads/1/3/0/4/130483400/264683.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/4/130488181/130488181.html#i%27+m+a+believer+drum+sheet+music

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001335.bin
cf52e79912a601af1331ae292bc03f3d7a86f071e05cb219688d9346a79925b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1335 8624 bytes
font_01_sfnt_off0000598a.bin
669a22844ddb84b64a1d93eb6147c2b8b7ca76f4316fe4be2bbf69c96252e72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598A 16180 bytes

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