Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc4768137601d7a…

MALICIOUS

PDF

84.7 KB Created: 2020-04-11 00:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 65f5b54e2fe075a1ffc757b03c0456d3 SHA-1: 22dc706bb1e3ddf3eb67021bc188f723ae5c6371 SHA-256: 1fc4768137601d7a7d115513637c5f447ce413e837ed8befa6df1a4363df875c
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or phishing. The document body, though heavily obfuscated, contains the text 'Nematodes in fish tank' and references wkhtmltopdf, suggesting a lure to unrelated content. The presence of numerous links to domains like '7levelselling.stefanaarnio.com' and 'kristinnevans.com' reinforces the attack pattern of directing users to potentially malicious or spam-related 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://7levelselling.stefanaarnio.com/uploads/1/3/1/4/131483361/131483361.html#nematodes+in+fish+tank
    • http://kristinnevans.com/uploads/1/3/0/3/130323522/lerozeridovuw-kevowo.pdf
    • http://misogi0001.com/uploads/1/3/0/7/130740264/6300bc4.pdf
    • http://lizaladybug.com/uploads/1/3/1/4/131408099/275013.pdf
    • http://hempliving.us/uploads/1/3/1/0/131069887/9802879.pdf
    • http://rocketleadsconsulting.com/uploads/1/3/0/8/130873941/lekutegaretiso_vilakozere_ritigi.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_off0001225d.bin
cb66dad22ab5ee2982e526e1a21aa350123592b335c2980c06861135f439ce02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1225D 9372 bytes

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