Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcd04aa2ed80bf1…

MALICIOUS

PDF

43.3 KB Created: 2020-03-30 03:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9d1aa1d67636cc59acbf63a949c2e038 SHA-1: 17c6068383de5c9bfa1fa2ca729e2f9813168f56 SHA-256: cfcd04aa2ed80bf16014ba765116808d067c8aa824c5335321301a392e585819
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing a large number of external URLs pointing to other PDF files. This technique is often used to manipulate search engine results or to distribute malicious content. The primary URL found in the document body is http://advance-it.net/uploads/1/3/0/5/130540176/130540176.html#imagenes+de+un+oso+para+colorear, which is part of this link farm. No scripts were extracted, and the document body content is largely obfuscated, limiting further analysis of specific malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://advance-it.net/uploads/1/3/0/5/130540176/130540176.html#imagenes+de+un+oso+para+colorear
    • http://amyrosemcdowell.com/uploads/1/3/0/6/130620839/zekozobo.pdf
    • http://colleencarter.net/uploads/1/3/1/1/131163908/5c48f6.pdf
    • http://oneskydronesoluions.com/uploads/1/3/0/3/130379612/godufobavivet-sozotig-gunosoko.pdf
    • http://thetinyballerinaproject.com/uploads/1/3/0/4/130476786/jinit.pdf
    • http://acpgroupe.com/uploads/1/3/0/2/130272333/golisoriz-lebap-sexoz.pdf
    • http://oiseauchic.com/uploads/1/3/0/8/130813547/ziwiru.pdf
    • http://streamboxtv.com/uploads/1/3/0/3/130323527/5febc8e07c.pdf
    • http://mendocinomarket.com/uploads/1/3/0/6/130604756/f28dcd.pdf
    • http://wagenselleryoga.com/uploads/1/3/0/7/130740169/rasosejeram.pdf
    • http://rosytribe.com/uploads/1/3/0/6/130604401/6ceb3db4685a3a7.pdf
    • http://selfiesquadlasvegas.com/uploads/1/3/0/8/130814288/2629704.pdf
    • http://riclimate.org/uploads/1/3/0/9/130969744/02ab94079.pdf
    • http://sweetexpressions4you.com/uploads/1/3/0/6/130604305/f94aa46b9.pdf
    • http://jusdesock.com/uploads/1/3/0/9/130969355/bawiwefowimep_buxenonigudu_gojifijituma.pdf
    • http://designinglifestylesbycorinne.net/uploads/1/3/0/2/130289021/880326.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_off00007561.bin
da9e01ffc383597a6267f306cb1c43d8983b1ca284fd5dd45105b9d1d94ed94f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7561 8920 bytes
font_01_sfnt_off000095b1.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B1 1708 bytes

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