Malicious PDF — malware analysis report

Static analysis result for SHA-256 de40575166b2abae…

MALICIOUS

PDF

41.6 KB Created: 2020-11-06 13:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d9bbe4b24ad00d5b91f131ab62ac00 SHA-1: 8d055887c03b0b6efa5ae04cc453257b8377c064 SHA-256: de40575166b2abae5fc4a255589ea01b0f5eee3db386176b273134911896e95e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, a common tactic for SEO spam or redirecting users to malicious sites. The embedded URL 'https://traffset.ru/aws?keyword=namso+gen+v5+apk' strongly suggests a lure to a site offering potentially malicious software. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://traffset.ru/aws?keyword=namso+gen+v5+apk
    • https://cdn-cms.f-static.net/uploads/4376362/normal_5f8a6ef51139c.pdf
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/lapasajojiwulir.pdf
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f8a721c1b483.pdf
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f8ca2091d94d.pdf
    • https://cdn-cms.f-static.net/uploads/4408881/normal_5f93bb662a342.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/joterige/wunesitugomikoxemapi.pdf
    • https://s3.amazonaws.com/fojaxexino/jurassic_world_the_game_apk_hack.pdf
    • https://s3.amazonaws.com/gizonukorad/42269169168.pdf
    • https://s3.amazonaws.com/tiduro/palm_beach_county_uniform_permit_application.pdf
    • https://s3.amazonaws.com/pisedij/26094785085.pdf
    • https://s3.amazonaws.com/potamotaz/benivevegivevesopeno.pdf
    • https://s3.amazonaws.com/gogonof/tasabafixakewike.pdf
    • https://s3.amazonaws.com/kufazete/chung_probability_theory.pdf
    • https://s3.amazonaws.com/subud/glencoe_science_biology_online_textbook.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005efb.bin
a20658bbe619b24bf230c9c74c553515c7628662c93d5a1211a3807d25d09b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 5228 bytes
font_01_sfnt_off000070ca.bin
c1cdacb88c8827529f4547a7002002991a3f57c572c05161715a32d9870482ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 4892 bytes
font_02_sfnt_off00008163.bin
3143d9971c88c5cc8091c4303efa0a503c8c73849b49a85dbfc8cd81b37eeb7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 11332 bytes

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