Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cc6c39a5d89f3d…

MALICIOUS

PDF

31.3 KB Created: 2020-04-19 03:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 65c715657b9c805f166a77ab24cf743e SHA-1: 082809fd9e9f1899f01b4d7a27994ed48ee8f0e3 SHA-256: 98cc6c39a5d89f3d48cbfdf136310b14eb64851aa03ca508b1e6442b1026d7d1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains numerous external links, a common technique for distributing malware or leading users to phishing sites. The document body, though heavily obfuscated, appears to reference a worksheet with answers, serving as a lure. The heuristic PDF_SEO_LINK_FARM specifically indicates a large number of external PDF links, suggesting a link farm designed to host 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://offplandubai.properties/uploads/1/3/1/4/131437341/131437341.html#verb+tense+consistency+worksheet+answers
    • http://snobz.co/uploads/1/3/0/6/130639852/4194338.pdf
    • http://aboerng.com/uploads/1/3/0/7/130740589/lizekupevasa_tufuju_romer_xatasizojo.pdf
    • http://broadstreetbarkery.com/uploads/1/3/1/6/131606092/nokozajaneposofuder.pdf
    • http://beastmodepromo.com/uploads/1/3/1/0/131070055/zowotuvonujemobaz.pdf
    • http://investwithal.com/uploads/1/3/0/5/130546645/5651131.pdf
    • http://bcatvclub.com/uploads/1/3/0/6/130621457/5894b89aef38647.pdf
    • http://gatewaydevelopmentgroup.org/uploads/1/3/0/7/130774968/8821806f.pdf
    • http://hunterinspection.com/uploads/1/3/0/2/130273842/1ecbcb12d3e78fc.pdf
    • http://mi4d.com/uploads/1/3/0/7/130776873/baxikigoxen.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_off00005438.bin
fcfd7d5af4406e27039ca69ca1d49def067a7be1bbcc38cb741b5c4207b38e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5438 7464 bytes

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