Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c5f82a00a6c45d…

MALICIOUS

PDF

31.0 KB Created: 2020-04-20 09:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4565432584fc69c3c4d76f391a3b9d50 SHA-1: 356897ddb264d9dbdcea86cc2a7921964b1e7b1c SHA-256: d4c5f82a00a6c45d7031ab96369932c0fd0d456ddf12127955f56fb8b649f22d
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which are numerically or generically named PDFs hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic. The presence of 'blackshot mobile apk' in one of the URLs suggests a potential lure for malicious mobile software. The document body, though heavily obfuscated, also contains some of these URLs, reinforcing the link-sharing behavior.

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://jamiefehr.com/uploads/1/3/0/2/130270869/130270869.html#blackshot+mobile+apk
    • http://cfoashland.com/uploads/1/3/0/3/130313144/6848869.pdf
    • http://danceballroomnj.com/uploads/1/3/0/5/130551654/melujub-tinili.pdf
    • http://militarylawyer.us/uploads/1/3/1/4/131438741/fegavatov_folovalizitixel_ziweme.pdf
    • http://twinriverstrading.com/uploads/1/3/1/6/131607805/gixosegimibil.pdf
    • http://eventstaffboston.com/uploads/1/3/0/5/130539843/tabalij_nezeli_sapopom.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_off00005350.bin
655405227694a3c5f5392a08aba4cacff0ef7a91ebc8c21cc2f90b92b5bd9a2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5350 7552 bytes

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