Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcafef94b584b2d4…

MALICIOUS

PDF

36.3 KB Authoring application: Pdftk
MD5: d5b2852e6672fb4a0edfc0c8ffa84e84 SHA-1: 35a4b4890517d0d7dc1aebd9ea173ff94cb2cdda SHA-256: fcafef94b584b2d46abd4268cacf3a4eb833690498c8acf9680fc44d554d1a96
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains references to PDF manipulation and includes URLs that are part of a link farm, suggesting the primary goal is to redirect users to potentially harmful sites.

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://silvercloudvape.co.uk/uploads/1/3/0/4/130489367/7716928.pdf
    • http://eco2magnesia.com/uploads/1/3/0/5/130590133/jixared-sopuxalugagak-niridogafudaj.pdf
    • http://alissajacobscmt.com/uploads/1/3/0/6/130604429/2a22533a.pdf
    • http://nice-body.net/uploads/1/3/0/6/130620475/fofobibajof.pdf
    • http://www.virtualpresence.ca/uploads/1/3/0/8/130874134/b8abad29aad6.pdf
    • http://sheeptheory.org/uploads/1/3/0/4/130476830/9365f4bf0b057.pdf
    • http://subrize.com/uploads/1/3/0/7/130775232/9a42e48aa2d9.pdf
    • http://carolinemontague.com/uploads/1/3/0/7/130775134/9056084.pdf
    • http://casachurba.com/uploads/1/3/0/4/130476085/fatafomor_munonewuxamo_kotiku_rewedi.pdf
    • http://natashacorriephotography.com/uploads/1/3/0/7/130775441/89896.pdf
    • http://ludgatehillpartners.com/uploads/1/3/0/6/130621045/7619565.pdf
    • http://mail.tutortestprep.com/uploads/1/3/0/5/130589077/nakironulak.pdf
    • http://mortedomar.com/uploads/1/3/0/7/130775282/5330374.pdf
    • http://scottgieser.com/uploads/1/3/0/5/130540477/1048940.pdf
    • http://autodiscover.jennifermannauthor.com/uploads/1/3/0/5/130541641/130541641.html#comment+regrouper+3+fichiers+pdf+en+1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003150.bin
3e09a7bb2c6e58e9409919e2223e51ba15ed755e51b276d967d2b73ce27dbada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 9852 bytes

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