Malicious PDF — malware analysis report

Static analysis result for SHA-256 9197459ed469ac6f…

MALICIOUS

PDF

69.1 KB Authoring application: Smallpdf Desktop
MD5: 04d05b4fe9e98de12f19465f4080f08d SHA-1: 98617be0bfce2fae6f4e787fdbad717f635c0d72 SHA-256: 9197459ed469ac6f356e9f01675634795f6e34ce11322cf4974dee088a5a9920
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as phishing-related. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading additional payloads or submitting sensitive information.

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://the57eatery.com/uploads/1/3/0/3/130324037/9980288.pdf
    • http://fefezus.robopay.ru/uploads/2020/01/27/rorarutodaxopevoge.pdf
    • http://fixas.conditionsnap.com/uploads/2020/01/28/2c01d2b4.pdf
    • http://pabomedu.spikedtearadio.com/uploads/2020/01/27/polilenarikodor.pdf
    • https://pebixure.weebly.com/uploads/1/3/0/4/130489499/bixeguligupuz_vulorukawediz.pdf
    • http://keku.oknovmlm.net/uploads/2020/01/28/368ce4dd5a8.pdf
    • http://redugi.climat23.com/uploads/2020/01/28/a58338.pdf
    • http://collier-pave.com/uploads/1/3/0/5/130540097/bab9530b8a.pdf
    • http://busuxan.seo-spytnik.ru/uploads/2020/01/28/3511556.pdf
    • http://nixodudili.swift-design.ru/uploads/2020/01/27/tetoxexipok_subasiwebeso_bibiweviki_jirik.pdf
    • http://metiscollege.ca/uploads/1/3/0/6/130639036/2291064.pdf
    • https://finofajofipusi.weebly.com/uploads/1/3/0/3/130323932/b7f446e2.pdf
    • http://tavufe.ecoopower.com/uploads/2020/01/27/3c4c1823a369b.pdf
    • http://zes.knvanna.ru/uploads/2020/01/27/7709874.pdf
    • https://woluvenox.weebly.com/uploads/1/3/0/2/130271211/xilizunumidukuf-nagawaxipufizaz-golotepilajosu-nigalek.pdf
    • http://myweeklyonline.com/uploads/1/3/0/3/130323717/zeloroleketijela.pdf
    • http://thelongroadfrombrownneh.weebly.com/uploads/1/3/0/6/130620923/130620923.html#mi+band+4+amazon+quiz+answers
    • 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_off0000159c.bin
8d685d5548e8e0b1a6939e3fc37859d8d11d17fe529c2081c0e8eb4392decb8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159C 9420 bytes
font_01_sfnt_off0000c8a8.bin
32b54217619f9438721b423dc2f4f4da0f78781b0811ea49af2be6b0310ecf56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A8 16164 bytes

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