Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dfc3ba2eca6b35…

MALICIOUS

PDF

44.0 KB Created: 2020-03-10 05:19:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 670bc049dc8e488bb8e7d5d3d7450747 SHA-1: 5ab3b936e88b927094e05d87df74e38f1af35094 SHA-256: 96dfc3ba2eca6b35edfe045db317bab2fa55cae699f7c75c79c86dfb41e1d452
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains text related to merging PDFs and mentions wkhtmltopdf, suggesting a potential lure for users seeking such functionality. The primary goal appears to be directing users to a network of linked PDF files, likely for SEO spam or to host further malicious content.

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://kandice-baker.pleasingfood.com/uploads/1/3/0/6/130639282/130639282.html#mac+merge+multiple+pdf+files+into+one
    • http://cleanforetagsstad.com/uploads/1/3/0/7/130739405/fozevuxuzaxagez_tenibodano_dazopamikite_vorifa.pdf
    • http://mutating.net/uploads/1/3/0/3/130313343/3a0246234c.pdf
    • http://www.sarahardin.net/uploads/1/3/0/6/130639673/sudebuxumopube.pdf
    • http://nihaosky.com/uploads/1/3/0/6/130620248/renasijudep.pdf
    • http://starspinwheel.com/uploads/1/3/0/4/130488181/9336619.pdf
    • http://www.klassen-gmbh.info/uploads/1/3/0/6/130639729/zafobemixo.pdf
    • http://www.healthytastycalories.com/uploads/1/3/0/8/130813372/1ac3894.pdf
    • http://counselinginlafayette.com/uploads/1/3/0/7/130739750/7656843.pdf
    • http://adamgregg.com/uploads/1/3/0/6/130620240/4593728.pdf
    • http://e5designs.com/uploads/1/3/0/2/130288507/9311363.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079bf.bin
2005eb23e09ec645bd07d721e381348a22cad58d45f838ad97ed1fa22d38d9bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79BF 8156 bytes
font_01_sfnt_off00009951.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9951 2652 bytes

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