Malicious PDF — malware analysis report

Static analysis result for SHA-256 9715d42edede01e3…

MALICIOUS

PDF

28.8 KB Created: 2020-04-20 17:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bd7bcdb7f740cb3f83207d82136a9287 SHA-1: 1d766e71fd8e9f262acb614e80b408ed25a9c97b SHA-256: 9715d42edede01e3e85f1cdd694fd607d8f693e06f83f0858dfe29384aa6216a
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, pointing to various PDF files hosted on different domains. This technique is often used for SEO manipulation or to distribute malicious payloads. The ML classifier also strongly indicated maliciousness.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://icngrowingingrace.com/uploads/1/3/0/8/130813885/130813885.html#birthday+party+gif
    • http://pagmiami.net/uploads/1/3/0/4/130476413/8588856.pdf
    • http://edgesbordersgaps.com/uploads/1/3/0/4/130478244/reridajejexufafuga.pdf
    • http://rapidetravels.org/uploads/1/3/0/7/130740207/4358974.pdf
    • http://mldecks.com/uploads/1/3/0/6/130620667/webig.pdf
    • http://thechattymagpie.com/uploads/1/3/0/7/130738501/kenavezubin.pdf
    • http://fedorvercammen.com/uploads/1/3/0/5/130539287/rorisizejip-guwox-tibogelenamalit.pdf
    • http://thriveandnourish.com/uploads/1/3/1/4/131406591/7ca8d582.pdf
    • http://m-zitko.si/uploads/1/3/0/7/130776518/8158516.pdf
    • http://qride.net/uploads/1/3/1/4/131406515/2e2277ef04532f.pdf
    • http://yourbestrealestateoption.com/uploads/1/3/1/4/131406564/18a0de01498b3.pdf
    • http://lucacydiageek.xyz/uploads/1/3/1/3/131380908/2547575.pdf
    • http://holzwurmuhren.at/uploads/1/3/0/4/130489359/waxonaravuw.pdf
    • http://justaskthehandyman.com/uploads/1/3/0/8/130874410/266645694e2f4e1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e62.bin
eb9a04a8084f42f5eb2e682f0c0f7dfb03610ebf36faa60d01409e2f42752b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E62 6208 bytes

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