Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfc3b104804a5fe…

MALICIOUS

PDF

41.8 KB Authoring application: pstoedit
MD5: 5e71ee4b5043347197b33f4eef72a577 SHA-1: 297ee907f29c281b3d66c2826fb5ebb7f684cac9 SHA-256: 0cfc3b104804a5fe4e5562abcf41ddb522ccdcd91d7c68d85ee3d4f33baa3bea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute further malicious content. ClamAV detected this as Pdf.Phishing.TtraffRobotInstall, and ML classifiers also flagged it as malicious. The embedded URLs are the primary IOCs, suggesting a campaign to drive traffic to these linked documents.

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://www.blackjackyachting.com.au/uploads/1/3/0/5/130551331/388627.pdf
    • http://minimalistlifedesign.com/uploads/1/3/0/4/130435895/jixoxulabed.pdf
    • http://visiteogukitalia.com/uploads/1/3/0/4/130435544/76f3b42.pdf
    • http://webdisk.vkinspections.com/uploads/1/3/0/7/130774979/2146423.pdf
    • http://mta10.somekindofsimple.com/uploads/1/3/0/6/130603941/dajidemi.pdf
    • http://bestofthemenu.com/uploads/1/3/0/6/130604320/a5f6eda9998313.pdf
    • http://mta-sts.mx.choralartsmusic.org/uploads/1/3/0/7/130776458/waxofonopiz-jelebevimijam.pdf
    • http://a-congsister.com/uploads/1/3/0/6/130639544/430a4.pdf
    • http://74-123-73-4.mgwnet.com/uploads/1/3/0/3/130313135/motuwa.pdf
    • http://escaperoomfairfax.com/uploads/1/3/0/4/130490277/8259907.pdf
    • http://snackopedia.com/uploads/1/3/0/4/130483140/mobasuwexoge.pdf
    • http://hostmaster.erincullimore.com/uploads/1/3/0/8/130814584/8245337.pdf
    • http://euniquemedicalsupplies.com/uploads/1/3/0/2/130272886/sidosonalujivam-mexifaguwolowi-fobizusolajari.pdf
    • http://anappleatdawn.com/uploads/1/3/0/2/130288317/zupiwerun.pdf
    • http://www.thrivecommunitycare.co.uk/uploads/1/3/0/6/130620731/dofoxawugifetep.pdf
    • http://mazorcasdecolombia.com/uploads/1/3/0/7/130739651/d7c9dddb8f4df.pdf
    • http://companionsofthehumanspirit.org/uploads/1/3/0/3/130379183/4060138.pdf
    • http://mypropertyquestion.com/uploads/1/3/0/7/130740368/882995.pdf
    • http://meattaffy.net/uploads/1/3/0/6/130603942/46a184c0ce.pdf
    • http://host237.carmichaelnl.com/uploads/1/3/0/3/130313524/130313524.html#obligationenrecht+gesetzestext+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003a4b.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A4B 2652 bytes
font_01_sfnt_off000045f9.bin
bba613ac48fff80ed7e880a50061579777bd7877600cde5a7977567a3ab194ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45F9 7780 bytes

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