Malicious PDF — malware analysis report

Static analysis result for SHA-256 38f8de7204f59fa0…

MALICIOUS

PDF

76.5 KB Created: 2020-04-27 21:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 647cb7bfcaedc696391f420cb47e5461 SHA-1: 31457e1b2f4f037c7a37391494a1dd95ece266da SHA-256: 38f8de7204f59fa005ffff68711a16f971d2941bb8a19233ad96f3e5f58fe8e4
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO spam or phishing campaigns. The document body, though heavily corrupted, contains text fragments related to 'antifungal and antiviral drugs pdf' and mentions 'wkhtmltopdf', suggesting a lure to external content. The presence of a PDF link farm heuristic further supports the attack pattern of directing users to potentially malicious or spam-related websites.

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://urbanvertical.ca/uploads/1/3/0/5/130543285/130543285.html#antifungal+and+antiviral+drugs+pdf
    • http://ericaroselevine.net/uploads/1/3/0/5/130540352/050f31f6fc.pdf
    • http://devoircollections.com/uploads/1/3/1/4/131437815/2026280.pdf
    • http://kittylomax.com/uploads/1/3/0/4/130491253/4c9fd50d0c5.pdf
    • http://2oldbroadsandabroom.com/uploads/1/3/1/3/131382271/a27f63cca.pdf
    • http://healthytribe.info/uploads/1/3/0/5/130551611/toputolesodomupip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e570.bin
b27950d64837e704a0e6024f76c6afdd3e1d2cddaf112a43e27bcce5abaf7825		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 8292 bytes
font_01_sfnt_off0001053c.bin
e9c2dc485f4bce99c7304d278734dc5d162c6d5a3f4525e0d0dcf62c717b02fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 3344 bytes
font_02_sfnt_off000110f7.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 16036 bytes

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