Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c59c0912bd0b6c…

MALICIOUS

PDF

40.8 KB Created: 2020-04-10 09:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 67366065475eddf49fd8b4c318322457 SHA-1: 3528e2676c39a316d661b314f29a99d1bdd83fc3 SHA-256: c4c59c0912bd0b6c2a9615b51768ecebae6754013527a7eedbbefff279c13895
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains a title related to complementary and supplementary angles, suggesting a lure to disguise the malicious intent. The primary function appears to be directing users to a vast network of linked PDF files hosted on various domains, likely for SEO spam or to distribute further malware.

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://benkregel.com/uploads/1/3/0/6/130639091/130639091.html#como+resolver+problemas+de+angulos+complementarios+y+suplementarios
    • http://qdroqueen.com/uploads/1/3/0/3/130379509/vetirono_supif_fafosekewuvujik_fixajip.pdf
    • http://artxllcusa.com/uploads/1/3/0/4/130476984/2a9d978.pdf
    • http://dancedietitian.com/uploads/1/3/0/7/130739488/5745422.pdf
    • http://madamepink.nl/uploads/1/3/1/3/131383698/loburutawi-dajem.pdf
    • http://bobrumbleart.com/uploads/1/3/0/7/130738944/tuxizasifu_rotobin.pdf
    • http://bineshdhakal.com/uploads/1/3/0/4/130479389/latepevewuka.pdf
    • http://lamariposacounseling.com/uploads/1/3/0/7/130775248/36862d611bcc6.pdf
    • http://claytongatemassagetherapy.com/uploads/1/3/0/5/130545957/virifumipo.pdf
    • http://charityleehairdesign.com/uploads/1/3/0/7/130739312/161a3d5.pdf
    • http://susaninwonderland.com/uploads/1/3/0/6/130621020/11aba7.pdf
    • http://vintage-military.com/uploads/1/3/0/5/130538988/7543654.pdf
    • http://changesfornewhope.org/uploads/1/3/1/3/131383848/17582bc2ab5c9a9.pdf
    • http://thenarcissisticbrain.com/uploads/1/3/0/5/130539034/8662878.pdf
    • http://signaturebusinessbrokers.ca/uploads/1/3/0/7/130739695/1585412.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066b5.bin
3a392f323eeeae7d87385eb0973317ccf5499971a3854ea11a92e774f1941b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B5 9232 bytes
font_01_sfnt_off0000882b.bin
c048ac4ed90d63bfae46472f65f9cf6fc0bd5e75369f2d8f28771a6d96a2731c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x882B 3156 bytes

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