Malicious PDF — malware analysis report

Static analysis result for SHA-256 776246ac2571c1cd…

MALICIOUS

PDF

28.8 KB Authoring application: Nitro PDF
MD5: af7aa948f6d8cf71bbe8a94ab09ca86b SHA-1: c558c949e4fd2b9739c547c24f47a8ff4020b09d SHA-256: 776246ac2571c1cd5a15f237f6ec210bde161153837e4524b9f5372ea7e703bc
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded URLs pointing to external PDF files, suggesting a link farm or a distribution mechanism for further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or spamming campaign, likely initiated via spearphishing attachment.

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://ccg501st.com/uploads/1/3/0/2/130289218/9618ced458d26.pdf
    • http://mydiabbyhc.com/uploads/1/3/0/4/130483354/saroditopa_vipikorikagel_tefana.pdf
    • http://kawira.datinglovers.store/uploads/2020/01/29/badub.pdf
    • http://rollitfrozencream.com/uploads/1/3/0/5/130550993/rurowegi_xuzuvil.pdf
    • http://ryanmurrayconductor.com/uploads/1/3/0/6/130604424/6546257.pdf
    • https://jemoreke.weebly.com/uploads/1/3/0/6/130605369/5dc8c.pdf
    • http://patfroelichcounseling.com/uploads/1/3/0/5/130539659/wawuga.pdf
    • http://newspiritholdings.com/uploads/1/3/0/5/130588668/4194457.pdf
    • http://belljarcafe.com/uploads/1/3/0/2/130289418/80e85f28f13b51c.pdf
    • http://woodlandstuition.com/uploads/1/3/0/4/130436258/130436258.html#rachel+parker+facebook

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001238.bin
8ba1f225a499fb256942a0904593cabae779e3f2f66e30f7b52a9ef13d1fc972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238 9392 bytes

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