Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a91dd67d44a57db…

MALICIOUS

PDF

85.1 KB Created: 2021-03-15 06:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c3737ce4390ff6fb8544778db18e125 SHA-1: 774a992c841b6acd0ef9eb5a70abd132580aa1f6 SHA-256: 1a91dd67d44a57db4713bee647e7a248be6d26d13174cf7878aa576859023d24
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO spam and phishing. The primary link directs users to a site offering a modified game application, suggesting a lure to download potentially malicious software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=world+conqueror+3+mod+apk+unlimited+medals+and+resources
    • https://cdn.sqhk.co/bobimugura/jedgcjf/final_fantasy_16_site_officiel.pdf
    • https://cdn.sqhk.co/nivavepe/w3gggfT/63491767692.pdf
    • https://cdn.sqhk.co/gagunewatevo/iidAifH/android_studio_emulator_app_store.pdf
    • http://raxejudesezix.scienceontheweb.net/honda_eu2200ita_2200-watt_inverter_gasoline_portable_generator.pdf
    • https://cdn-cms.f-static.net/uploads/4405639/normal_6043dd422d473.pdf
    • https://cdn.sqhk.co/zukasedu/I1ujfhg/freeway_vs_highway_vs_interstate.pdf
    • https://cdn.sqhk.co/busibelifiv/NgjDjbF/punukuvikasavuwagaxazipi.pdf
    • https://cdn.sqhk.co/gorubabor/Hge4fja/bamujowim.pdf
    • https://cdn.sqhk.co/tuwagezo/X3piahd/bukuvoziwenukipusesuziriz.pdf
    • https://cdn-cms.f-static.net/uploads/4446174/normal_6049f1497d5f6.pdf
    • https://static.s123-cdn-static.com/uploads/4390681/normal_600761b3cff29.pdf
    • https://cdn-cms.f-static.net/uploads/4391920/normal_604748b4b555f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_891ee85b7fa941cbaa477bdf6ed086b9.pdf?index=true
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_3456256f24a34c868de385dc051d93b2.pdf?index=true
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_5a2c450e7c3a4c2e98ec27ea3e8bf836.pdf?index=true
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_28f71cf3e60546c6a73a0a3785e15ca7.pdf?index=true
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_f8294d799ab74c6f9cd56e4dc53e23d7.pdf?index=true
    • http://zegetafirotazaz.atwebpages.com/letter_of_intent_artist_residency_sample.pdf
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_8d6dd25b36794b1098ebb1667a6c42ef.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed0b.bin
e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 2952 bytes
font_01_sfnt_off0000f799.bin
48a82fb4d955ade7f097a296a0667edcc22ae53b936ae507c38d90ecf102d5b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF799 5584 bytes
font_02_sfnt_off00010a88.bin
b2fdd7768d21d7f45635b5a7bc4d6efe0a6c5a53780b9b9e6ae0393511387861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 11064 bytes
font_03_sfnt_off000130c2.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C2 16204 bytes

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