Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf43928ed7c8e7c8…

MALICIOUS

PDF

37.5 KB Authoring application: pdf-parser
MD5: d6ad02e07b853757098ba56d22f22e84 SHA-1: e91be24f3ab912542595ebf62b1b811db46fc5f9 SHA-256: bf43928ed7c8e7c8f89764cf7f3258dfc7f25079ebc1e25da72956876e3b6acf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though partially corrupted, mentions 'Tips for ielts reading general', suggesting a lure to potentially deceptive content.

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 https://mofusujutoda.weebly.com/uploads/1/3/0/6/130604505/wofefiduvinobujete.pdf
    • http://alicia-stop-n-shop.com/uploads/1/3/0/7/130775498/9466116.pdf
    • https://managapelebe.weebly.com/uploads/1/3/0/5/130588681/5302614.pdf
    • http://djjeremiah.com/uploads/1/3/0/3/130323148/fae69f9a6def.pdf
    • http://thequiltstudio.com/uploads/1/3/0/4/130435710/xidifomivejugef.pdf
    • http://cantonfair2u.com/uploads/1/3/0/3/130379222/75a9f7432b5598.pdf
    • http://agentlemansartwork.com/uploads/1/3/0/5/130540065/giranigenesov_kivoxaga_pimekewuw_pifijivif.pdf
    • http://msmarmenia.org/uploads/1/3/0/2/130291572/jopojigav.pdf
    • http://topdream.pro/uploads/2020/01/28/de5dacff.pdf
    • http://new-style-trailer.com/uploads/1/3/0/5/130588988/d56f835b.pdf
    • http://themethodmeditation.com/uploads/1/3/0/5/130545884/130545884.html#tips+for+ielts+reading+general

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000128a.bin
0a2efe7e75ac8b89088d25c40c4684d8839fba65820df07ed96bb32d23939df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A 8160 bytes

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