Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c5824fba0a6750…

MALICIOUS

PDF

38.3 KB Created: 2020-03-29 08:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1d1de97ecb9bae6bb8d223254987c78e SHA-1: 53c8049af3fe7048a6e8a50c8e53cbd73aa06ff8 SHA-256: 21c5824fba0a67500a3d7d34f0acdbc6f4e890e32fa35e53531d465ff127aceb
70 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, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text but also includes one of the external URLs, indicating it's part of the link distribution. No scripts were extracted, and the primary malicious activity appears to be the distribution of numerous external links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://advance-it.net/uploads/1/3/0/9/130969323/130969323.html#clinicas+de+salud+del+pueblo+inc+brawley+ca
    • http://www.recoverytoday.org/uploads/1/3/0/5/130551302/mejitazumu.pdf
    • http://zebraspeech.com/uploads/1/3/1/0/131070284/pukegifafomugi.pdf
    • http://buffalolagoon.com/uploads/1/3/0/5/130551325/ebdaf16cc12ed.pdf
    • http://cajunfiya.com/uploads/1/3/0/7/130738528/fitikuzulifefuz.pdf
    • http://tridentinfosec.org/uploads/1/3/0/5/130544823/7956211.pdf
    • http://www.tejontech.com/uploads/1/3/0/5/130550830/4a17fdc2481.pdf
    • http://brosprojects.com/uploads/1/3/0/7/130739893/wewexopov.pdf
    • http://pooleyslaw.co.uk/uploads/1/3/0/6/130620314/refuwotaf.pdf
    • http://rakisproductions.com/uploads/1/3/0/8/130874084/diguburulitozem.pdf
    • http://watercalm.org/uploads/1/3/0/4/130436431/mipopuvederixal.pdf
    • http://mydouchebagex.com/uploads/1/3/0/6/130621589/0fedf986.pdf
    • http://www.krazykarzunlimited.com/uploads/1/3/0/2/130271094/mibedamotaruso.pdf
    • http://www.cleantechoil.com/uploads/1/3/0/2/130287862/vadut.pdf
    • http://74-123-77-226.mgwnet.com/uploads/1/3/0/2/130289519/nuzuroxo.pdf
    • http://bostoneducationcompact.org/uploads/1/3/1/3/131398281/najavudabovetu.pdf
    • http://www.matthewharding.co.uk/uploads/1/3/0/7/130739223/1132401.pdf
    • http://banjarkids.com/uploads/1/3/0/5/130539078/6247399.pdf
    • http://merwininsurance.net/uploads/1/3/0/6/130604958/1149762.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_off00006dec.bin
c555461f70cc9058b0488123ddd1e7b0585a8486e74bf70e1ba468e4eaf46986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 7612 bytes

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