Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5edaf9bfab8f06…

MALICIOUS

PDF

44.6 KB Authoring application: Scribus
MD5: ab30b3b0f11ca4ae450ebc3a3985c992 SHA-1: 33e613ad9588c779407614a3b8a3fff71e6d8e37 SHA-256: ad5edaf9bfab8f0699a89f74d92a959f105a2ed5f99c572f103ce4f259e48a6b
150 Risk Score

Malware Insights

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

This PDF file exhibits a critical heuristic firing for a PDF link farm, containing numerous external links to other PDF files hosted across various domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest a campaign focused on SEO spam or potentially phishing by redirecting users to a large number of external resources.

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://solitlife.net/uploads/1/3/0/4/130478174/pizuxupukogub_kasaf.pdf
    • http://cardinaltranscribing.com/uploads/1/3/0/6/130620371/70594.pdf
    • http://pausejudgement.com/uploads/1/3/0/4/130435598/xixunasewejagopeso.pdf
    • http://stavrias.com/uploads/1/3/0/5/130551083/c0632.pdf
    • http://cr3ds.com/uploads/1/3/0/5/130550690/bd0f8ec6.pdf
    • http://loje.umassage.ru/uploads/2020/01/29/tenudegerovatu_vokopetovoto.pdf
    • http://cbdforbullys.com/uploads/1/3/0/6/130620364/6286470.pdf
    • http://nightingaleicecreamsandwiches.com/uploads/1/3/0/7/130739250/wojuvagipuwik.pdf
    • http://rinievandriel.com/uploads/1/3/0/6/130621127/3275612.pdf
    • http://asylumgeek.com/uploads/1/3/0/6/130604482/titufuxetijuw.pdf
    • http://5toolgroup.com/uploads/1/3/0/4/130476317/8629572.pdf
    • http://msaimports.com/uploads/1/3/0/6/130605278/kavujesunuvupo.pdf
    • http://burgangt.com/uploads/1/3/0/2/130288710/130288710.html#danvers+ma+police+report

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001442.bin
70a58bce30a4638d5ba97d4bfc24ebd2b0815805be27ca20787f9ef2147fb58d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1442 8396 bytes
font_01_sfnt_off00006845.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 16036 bytes

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