Malicious PDF — malware analysis report

Static analysis result for SHA-256 7575e29a0cafe932…

MALICIOUS

PDF

143.3 KB Created: 2021-03-15 10:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b59141e68f3bb70ff6472f7149756743 SHA-1: 17e595ed003cbab1fa3cf8b4c5212c94924a80e7 SHA-256: 7575e29a0cafe932e0ac5a87a1346ab6783b1f5683c722b9ce6e779987fb343e
156 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a heuristic firing indicates a link farm of external PDF documents, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure. No scripts were extracted, but the presence of multiple external links and a high ML score indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://vilenefex.ru/wix?keyword=jedi+guardian+questions+kotor
    • http://scrlt.xyz/tamasha_video_songz3hdy.pdf
    • http://netewe9.xyz/river_road_cookbook_281o3hwd.pdf
    • https://cdn.sqhk.co/wevafofed/gjl230V/postknight_pets_food.pdf
    • https://cdn.sqhk.co/movijomo/jihhaEF/zesijejapel.pdf
    • https://cdn.sqhk.co/bibunifez/ggjFxib/snake_eyes_piercing.pdf
    • https://cdn.sqhk.co/vutowogipu/jShdLgd/73862044302.pdf
    • https://cdn.sqhk.co/mozedizupi/egdjjhh/xojexibipekeb.pdf
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/5782728.pdf
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/6171990.pdf
    • http://art-practice.org/lelorutuwopefipufaxoxezx9gd2.pdf
    • https://begazasageb.weebly.com/uploads/1/3/1/6/131637419/32d06e7151317.pdf
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/74eb89b.pdf
    • https://cdn.sqhk.co/jujadiziga/hicIsKG/islanders_vs_flyers_game_1.pdf
    • http://technodom11.com/puforipudixir2sv2s.pdf
    • https://cdn.sqhk.co/nomazotesi/0JghLhh/zadizinevomokarusoguwatoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_e4beeac18a58426b91ff4d8035eb0379.pdf?index=true
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_5b22f8db09bc4200b9b95d472f89facf.pdf?index=true
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_edec696c3d5d4e3f94f37afd088c8e49.pdf?index=true
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_ff4f0124030a4984bd58872cb30d4754.pdf?index=true
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_fba8b1f885d040249ef86bfdb41c5e92.pdf?index=true
    • https://101c3d73-5e22-4da1-a203-a3a2a794ce88.filesusr.com/ugd/69a512_097eb5e9d7e442d6b3479bd6ebff084f.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_e84d7b3d6f0e465bab59a153435c5a42.pdf?index=true
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_dbbc180985cc4c4b8d191becab8e2cee.pdf?index=true
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001fcc4.bin
351bf679a395203b44365896540662b3f779eca17bd2414ca3782ad9f57e2abf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1FCC4 10672 bytes
font_00_sfnt_off0001ebac.bin
d87fc44ec65876ac2cb7a3867ef5795fc53167341127a898f0566265b017f447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EBAC 5024 bytes
font_02_sfnt_off00022133.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22133 4324 bytes

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