Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98cbb8ac0e3e2af…

MALICIOUS

PDF

53.8 KB Authoring application: pstoedit
MD5: 05c2cf088f5c71324a8dc12c763d9820 SHA-1: edbd1679ec23ba5e086259a5212ccae10c4b04b3 SHA-256: d98cbb8ac0e3e2aff49c86d680864a933dffdb50f3ffad9a606dabc830243240
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is a common technique for distributing malicious content or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting the primary purpose is to redirect users to these 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://bldngts.com/uploads/1/3/0/6/130639613/469138.pdf
    • http://racingshoxsweden.com/uploads/1/3/0/6/130639032/fatika_vinitefuxuvuxug_lenorusitojodi_mekilanus.pdf
    • http://modelmefamous.com/uploads/1/3/0/5/130590195/gemunesozida-kugidifimovet-gobumonati-luvifos.pdf
    • http://k-cast.net/uploads/1/3/0/4/130483364/ragejalixu.pdf
    • http://hostmaster.realisa.nl/uploads/1/3/0/6/130604938/samikogirafokoxawi.pdf
    • http://sdorsher.com/uploads/1/3/0/2/130289410/fimanivojo.pdf
    • http://muevetefacil.com/uploads/1/3/0/6/130603827/kukozesamad.pdf
    • http://www.wildtundraquest.com/uploads/1/3/0/5/130539714/048c4b.pdf
    • http://rogerrealty.com/uploads/1/3/0/5/130588687/wegamopovaxirisokif.pdf
    • http://dataprotectionadvice.com/uploads/1/3/0/3/130313854/3d2e0ea9cb7b.pdf
    • http://www.catesweddingcreations.com/uploads/1/3/0/6/130621033/2e08784eaf61a.pdf
    • http://augustinelab.org/uploads/1/3/0/6/130621021/3004f06fb681121.pdf
    • http://ndhumanities.com/uploads/1/3/0/5/130542953/4854813.pdf
    • http://cherryhilllawncare.com/uploads/1/3/0/4/130483868/3653285.pdf
    • http://greatmeolspreschool.com/uploads/1/3/0/5/130550698/zufoso.pdf
    • http://nw2.me/uploads/1/3/0/6/130640006/dixejixixiw.pdf
    • http://finegerman.com/uploads/1/3/0/7/130775778/ecaffa6178.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/2/130287371/130287371.html#alice+in+wonderland+book+original+illustration

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000116d.bin
b863f0696efe47ea6593bae1b3bf9ed83628445fcc7d2e615dab3a50cde0670d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D 9200 bytes

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