Malicious PDF — malware analysis report

Static analysis result for SHA-256 2194c437fc52d1a5…

MALICIOUS

PDF

59.8 KB Created: 2020-04-27 05:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 04d1b8b11a592e02ee5b60aa50851ec3 SHA-1: 384ae081f2ab14e5cc301ecefa797ef34b125eed SHA-256: 2194c437fc52d1a5cf0550a515b44b1ff59da378b09032dea32d456a47287ae7
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique commonly used for SEO poisoning or to distribute further malicious content. The ML classifier strongly indicated maliciousness. The document body text is heavily obfuscated, but the presence of numerous URLs suggests a link farm or redirection scheme. No scripts were extracted from this sample.

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://urfacefix.com/uploads/1/3/0/6/130639278/130639278.html#cavite+mutiny+pdf+tagalog
    • http://easyclicktoearn.com/uploads/1/3/0/7/130738564/5b543736b0e5867.pdf
    • http://ewebextra-impact.com/uploads/1/3/0/5/130539818/juxejetitifusekejej.pdf
    • http://carecounselinglv.com/uploads/1/3/0/8/130814118/8e042.pdf
    • http://tonieastwood.com/uploads/1/3/1/3/131381850/ff9a23e.pdf
    • http://fast4wardmarine.com/uploads/1/3/1/3/131382536/jasenuzi-zajefaxeril.pdf
    • http://100leaderswhocook.com/uploads/1/3/1/1/131163931/loloxifixerifigekawo.pdf
    • http://furadelphiafriendsfoundation.org/uploads/1/3/1/3/131380001/kevegiwerija-xujetibuno.pdf
    • http://patdusting.com/uploads/1/3/1/1/131163538/wetad.pdf
    • http://ahabancommunications.com/uploads/1/3/0/4/130436108/5625248.pdf
    • http://credit-default-swap-attorneys.com/uploads/1/3/0/7/130776325/tunejiji.pdf
    • http://humblebundleofjoy.com/uploads/1/3/1/3/131379743/225918e650e.pdf
    • http://monabadawy.net/uploads/1/3/0/2/130271076/1788030.pdf
    • http://impactproductionshome.com/uploads/1/3/0/4/130436525/botimemirowaxap.pdf
    • http://landingartistsstudio.com/uploads/1/3/1/4/131455198/1214810.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_off0000af3f.bin
1b2ad5599c533ef39e80fea91cf64f0669a74c865d4a10b78a1995b9cf88f5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3F 8348 bytes
font_01_sfnt_off0000cdd4.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD4 16036 bytes

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