Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c8a06a73adc2ff…

MALICIOUS

PDF

29.1 KB Authoring application: Smallpdf Desktop
MD5: 716b9daf8a61b1fd96039b794a1e3a6a SHA-1: 7ff2bb240772beb6a285b54d000e3a4637cdb2cd SHA-256: 18c8a06a73adc2ffc7e53f226f7770c80daf3d575667c4e8a0b082415082c8db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded URLs, forming a link farm, which is a common tactic for phishing and SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, despite being malformed, attempts to lure the user with instructions about connecting a headset, suggesting a pretext for downloading further malicious content.

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://b2ac757f02674e8639f4f9b97bc1e0f7.caseoffice.cc/uploads/1/3/0/2/130287426/zasafifoto.pdf
    • http://dominiondistillers.com/uploads/1/3/0/7/130775560/wewiwobum.pdf
    • http://ksaccountants.com/uploads/1/3/0/3/130323516/5979912.pdf
    • http://criticaluniversitystudies.org/uploads/1/3/0/7/130739964/697a5741769ca3.pdf
    • http://treeservicechulavista.com/uploads/1/3/0/5/130588849/d3aa0f90489592.pdf
    • http://eworkshop.crispinsandford.com/uploads/1/3/0/6/130622042/dabale-voresebawosi-zepinibar-fugus.pdf
    • http://richardsnashall.net/uploads/1/3/0/2/130270898/9ea968f.pdf
    • http://lakefieldbaptistchurch.org/uploads/1/3/0/3/130323471/wifopokozezu.pdf
    • http://thehockeydennl.com/uploads/1/3/0/5/130543364/99e2bc7e5f6.pdf
    • http://lauryan.org/uploads/1/3/0/5/130539691/zamekuwopedodad.pdf
    • http://www.tomczyki.com/uploads/1/3/0/6/130604114/wowipazajiwono.pdf
    • http://mta-sts.karolinafreino.com/uploads/1/3/0/7/130739575/jafovufimu.pdf
    • http://taoswellwoman.com/uploads/1/3/0/8/130814279/130814279.html#how+to+connect+afterglow+headset+to+ps4+bluetooth

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001b02.bin
10f6d8d54a944ae0999e11d163e273263badf4186ae7bf454c85a5e492278c29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B02 7304 bytes

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