Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f86d2444777b705…

MALICIOUS

PDF

41.5 KB Authoring application: Solid Converter PDF
MD5: 26df4239c280a6e1069c4576393ddaf5 SHA-1: 9afc1c5aed3abc8abb93841ac9a6e3afe98df744 SHA-256: 5f86d2444777b705cba0c278066850175135d35070f3ac0fba8751146d09956d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a phishing or scam campaign aiming to redirect users to malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file. No scripts were extracted, but the primary attack pattern involves directing users to external URLs.

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://taterboss.net/uploads/1/3/0/7/130775375/ragifavup-valawubexarok.pdf
    • http://mrssouthernsclass.com/uploads/1/3/0/3/130379232/35652f99197d.pdf
    • http://kylielyall.com/uploads/1/3/0/2/130272851/4763763.pdf
    • http://gaycockhero.com/uploads/1/3/0/3/130379254/nunod-madozuxikega-xireve-firavuf.pdf
    • http://mail.tgwca.org/uploads/1/3/0/3/130379291/cf0a4f6f70.pdf
    • http://escortbargain.com/uploads/1/3/0/6/130640164/6157207.pdf
    • http://spyclan.com/uploads/1/3/0/7/130776648/ae4e108b17e4.pdf
    • http://nolaclay.com/uploads/1/3/0/2/130270893/777e9be.pdf
    • http://makeyourmark.shop/uploads/1/3/0/7/130739141/463090.pdf
    • http://toming90.com/uploads/1/3/0/5/130541186/gabikigudikovi_gaxure_galubut_ratukiwedimobuf.pdf
    • http://mrhowe.org/uploads/1/3/0/5/130540037/25b40d9c0a893bf.pdf
    • http://casparscatering.com.au/uploads/1/3/0/3/130324065/kojit.pdf
    • http://kristen-stone-the-writer.com/uploads/1/3/0/7/130776269/wanaxex.pdf
    • http://jessica-and-jaso-1.rominastiebenphotography.com/uploads/1/3/0/2/130289663/130289663.html#3+phase+kw+to+amps+chart

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004956.bin
5ee28437bd23e5a222d167a6c1f306fe3b5b00f0cf6196e96df901277f25268d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4956 8096 bytes

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