Malicious PDF — malware analysis report

Static analysis result for SHA-256 37b553a921174854…

MALICIOUS

PDF

34.5 KB Created: 2020-05-10 23:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be8c7850f054dabb35a2c76bcd4b556a SHA-1: 1bcfba1b8915d2ef72de80655e0779ec06b72528 SHA-256: 37b553a9211748547fc803223f559704e97b1a3e64bd7ee6003ffe75e6db9917
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains. This pattern is indicative of a link farm designed to obscure the ultimate malicious destination. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document intends to trick the user into downloading a password-protected archive, likely containing a secondary payload. No scripts were extracted from this sample.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://project23tozero.org/uploads/1/3/0/5/130543941/130543941.html#yellow+chords+pdf
    • http://rgoreymedia.com/uploads/1/3/0/6/130621951/kizutalaroletu.pdf
    • http://saumoidesign.com/uploads/1/3/0/6/130639532/gerogufujigo_misuwujakujemu_nikijuni_zesizerewip.pdf
    • http://girlbosscincinnati.com/uploads/1/3/0/5/130552055/7221092.pdf
    • http://spilt-salt.com/uploads/1/3/0/9/130969600/juvibal-nefesusim-womevopo-jakifozi.pdf
    • http://giselledias.com/uploads/1/3/0/6/130620730/5661330.pdf
    • http://blood-sweat-beers.com/uploads/1/3/0/2/130272443/dc51f9866.pdf
    • http://millcreeknaturals.biz/uploads/1/3/0/2/130272389/mevum_vomepotozon_jeboxojibefitu.pdf
    • http://joepadremusic.com/uploads/1/3/1/4/131483267/doxugo_lulazisew_vobemawapa_gatupiwurej.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00005abf.bin
2e56ad9b3a52a56dcac5cbc5396c1a899746224b5fe2455071756585b9964080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABF 10652 bytes

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