Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b346d20a43c74d6…

MALICIOUS

PDF

33.4 KB Authoring application: QPDF
MD5: b40d5637f272aff40cc3ccd0b6c95e8d SHA-1: 15dc93b6ed6b29fc5fd666e86bb24446d32b218f SHA-256: 5b346d20a43c74d60ece798a541b98027c33c86e46947800fd2639ed893fe3aa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm, which is a common technique for distributing malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically identifying it as a phishing-related threat. The embedded URLs likely lead to further malicious documents or exploit kits.

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://morganmwilliams.com/uploads/1/3/0/2/130287881/2215091.pdf
    • http://doeverythingwithgrace.com/uploads/1/3/0/6/130603823/8824200.pdf
    • http://sharingthestory.org/uploads/1/3/0/6/130640102/943389.pdf
    • http://mrramsay.co.uk/uploads/1/3/0/6/130640023/8e811.pdf
    • http://hipaawebcasts.com/uploads/1/3/0/6/130604580/591f0c3dacc.pdf
    • http://design-strong.com/uploads/1/3/0/5/130545957/saxivomo.pdf
    • http://comeseemyjamaica.com/uploads/1/3/0/7/130739443/123a94719031a.pdf
    • http://myukpensiontransfer.com.au/uploads/1/3/0/4/130490245/voxowapuvudo-xenufel-kopele-vujan.pdf
    • http://youngatheartdesigns.com/uploads/1/3/0/6/130604018/2c74c1c6.pdf
    • http://badbear.ca/uploads/1/3/0/5/130589099/jejexivepur-golox-tifivitidatisuj.pdf
    • http://msexcelplus.com/uploads/1/3/0/5/130543351/lujapiz.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/6/130620399/130620399.html#nfhs+basketball+rule+book+2018-19
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001222.bin
ed3d6ebda3204c843b0e8e021975318e696b5c6c07bd10e54311c2fae489a49f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222 7568 bytes
font_01_sfnt_off000046dc.bin
41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46DC 2600 bytes

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