Malicious PDF — malware analysis report

Static analysis result for SHA-256 6079858bce26f861…

MALICIOUS

PDF

40.3 KB Authoring application: ImageMagick
MD5: ef372cbc9f733fe9381eec8e341c83b8 SHA-1: bb8b9b7e39006c9d62a8ca26a93c381070b0d31c SHA-256: 6079858bce26f86178dcb819375d89452c73a130ab615b6bbd4529734eec26f5
192 Risk Score

Malware Insights

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

The PDF contains a mass of external links to other PDF files, disguised as a movie streaming lure. The heuristic PDF_SEO_LINK_FARM and PDF_SUSPICIOUS_LINK_LURE indicate a campaign to distribute malicious content via these links. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://tastinggame.eu/uploads/1/3/0/2/130273738/xofomoribamibunot.pdf
    • http://asia-africarenewableenergyforum.org/uploads/1/3/0/5/130550966/gajonaleralut-zudota.pdf
    • http://natureallbody4ever.com/uploads/1/3/0/4/130489051/bagigopiwepem.pdf
    • http://mikeisthekey.com/uploads/1/3/0/5/130588403/wifojowoguxo_dujaj_wixop.pdf
    • http://rl3.es/uploads/1/3/0/2/130288359/9482429.pdf
    • http://federalhelpsupport.live/uploads/1/3/0/5/130588315/mefeloperiduro.pdf
    • http://spedtechteacher.com/uploads/1/3/0/6/130603918/6625863.pdf
    • http://mikkimono.net/uploads/1/3/0/6/130640183/234f32f.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/6/130604182/130604182.html#assistir+velozes+e+furiosos+9+comple
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123d.bin
d33f6cdfbe2aff4fe92c6bb540e006981e190b2d303b58e9db898caa9d959c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D 10708 bytes
font_01_sfnt_off00005694.bin
f304d5248de4d2d535e11e5a3f00133999c598ccb7ee943f2677ab784214679d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5694 16208 bytes

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