Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa511de3f188f2df…

MALICIOUS

PDF

32.8 KB Authoring application: Karbon
MD5: d14f0b8395038e1914b704bc31ed597e SHA-1: 2de5162a86d39287ddc7b5b335e2988780552747 SHA-256: fa511de3f188f2df942b396d4473af047f03c75a8cad1b082fd23fb98eb62e0d
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs likely serve as a lure to redirect users to malicious sites, potentially for phishing or malware distribution.

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://guluju.empire-business.ru/uploads/2020/01/28/9235515.pdf
    • http://alphamediaagency.com/uploads/1/3/0/5/130589031/1147618.pdf
    • http://actionanimals.tv/uploads/1/3/0/5/130545733/8937130.pdf
    • http://northern-carbon.com/uploads/1/3/0/5/130589045/273953.pdf
    • http://canapakm0.it/uploads/1/3/0/6/130620819/6448930.pdf
    • http://thanks.republican/uploads/1/3/0/6/130639027/xegunafigeg.pdf
    • http://paschal77.com/uploads/1/3/0/3/130379821/vujok_welewokasikidiv_fosavuk.pdf
    • http://chrisarkwright.com/uploads/1/3/0/4/130436147/30981f91ada15.pdf
    • http://ekki.co/uploads/1/3/0/4/130478160/gitazotixuruje.pdf
    • http://toxicologist-katie-chiang.com/uploads/1/3/0/4/130477566/44f00b.pdf
    • http://quillesthon.com/uploads/1/3/0/3/130324386/wegerenido_zonelowefox_zuxolalori.pdf
    • http://doublekdorpersheepranch.com/uploads/1/3/0/6/130620393/130620393.html#gw2+harrier+accessories

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000127b.bin
02c804ba2698d87c1ccd9f5be5d26523fdead3c69acc3bc2bb816cd81ee849fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127B 7868 bytes

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