Malicious PDF — malware analysis report

Static analysis result for SHA-256 317a3a8066fffd07…

MALICIOUS

PDF

28.2 KB Created: 2020-04-23 23:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 42f1d12de919400f8786ab03a6823b3e SHA-1: e5183eaf591da37b5cadd259cf92e842cc56e351 SHA-256: 317a3a8066fffd07ae67349ceec2dc5bd82155e520b16a21cc2bb3d7a7c4d233
62 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, a common technique for SEO poisoning or redirecting users to malicious sites. The document body text, though partially corrupted, includes a search query for 'Casio scientific calculator fx 991es apk', suggesting a lure to attract clicks. The heuristic PDF_SEO_LINK_FARM firing confirms the presence of a link farm, indicating a malicious intent to drive traffic to potentially harmful 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://the-whole-thing.com/uploads/1/3/0/7/130739021/130739021.html#casio+scientific+calculator+fx+991es+apk
    • http://flauntfashion.net/uploads/1/3/0/5/130551941/xefobok_lisavof.pdf
    • http://leblog.luludansmarue.org/uploads/1/3/0/6/130621161/niwitujulud.pdf
    • http://krispheroart.com/uploads/1/3/1/1/131164164/rexapopoz.pdf
    • http://oblivionartbar.com/uploads/1/3/1/3/131380899/ferereginum.pdf
    • http://nyaticapital.com/uploads/1/3/1/0/131069840/doxazuxonoxu.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_off0000439c.bin
86b0dbaf2bee63daa90bc97198b605197cf1705cf1a0decfbc3f051b52c80e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x439C 8452 bytes

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