Malicious PDF — malware analysis report

Static analysis result for SHA-256 73274e8a5e3fde37…

MALICIOUS

PDF

34.2 KB Authoring application: SWFTools
MD5: cabe02482d35e41b15e93c26dee24728 SHA-1: 121353a4ddfbc660fefa9e0d76e1aed367ccbece SHA-256: 73274e8a5e3fde3787e45cf113285ce6f38bebb3c39155d96f92ac637d69dba5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or content distribution vector.

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://nannytram.com/uploads/1/3/0/5/130552055/6139332.pdf
    • http://radiba.distritok.info/uploads/2020/01/28/situmonuvivowoxo.pdf
    • http://my-credential.com/uploads/1/3/0/2/130289418/7042001.pdf
    • http://societeimperiale.com/uploads/1/3/0/5/130543134/kamore-vajovaf.pdf
    • http://edmdealer.com/uploads/2020/01/28/lotumo_vupebipajagom.pdf
    • http://rosepalmerlaw.com/uploads/1/3/0/5/130588191/7770026.pdf
    • http://quarkstein.net/uploads/1/3/0/4/130483745/8245889.pdf
    • http://miracleinabucket.com/uploads/1/3/0/8/130874634/130874634.html#auma+actuators+middle+east+dubai

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010e5.bin
96612a218f7bf612946cfa97448ae2513f1d40d0d62234e30e55258fdb92cf08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5 7932 bytes

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