Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc73df8b49b4264…

MALICIOUS

PDF

82.2 KB Created: 2021-03-15 05:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 225c998ab077dc8faa80100df6108cfe SHA-1: 9c09e4467cbe136ae1215fd288cab3e2d0512ca6 SHA-256: 7bc73df8b49b426402567b9c4205a5bd2d5d63e3463d1f6d1786c15acfdf48c6
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicative of a link farm designed to attract traffic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/wix?keyword=louise+hay+books+pdf+free+download
    • https://cdn.sqhk.co/nemisova/nibiWYG/jegowejo.pdf
    • http://oneshops.space/manual_hoyer_lift_instructionshwc5n.pdf
    • http://conicppjry.bid/saziwixavemesufugawipe2kjzv.pdf
    • https://cdn.sqhk.co/powirafawume/gghx2ji/sitirimatezo.pdf
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/3248026.pdf
    • https://rokosogamutoluf.weebly.com/uploads/1/3/0/8/130873735/d51611d38bc.pdf
    • https://mozawexi.weebly.com/uploads/1/3/1/8/131856146/wezolabugefim.pdf
    • https://gujejedadun.weebly.com/uploads/1/3/1/3/131398181/2880627.pdf
    • http://predouche.xyz/89138394254qico4.pdf
    • https://cdn.sqhk.co/mozoposowi/ggg99oP/space_simulator_mod_apk_unlimited_fuel.pdf
    • http://soul-felt.com/skyrim_how_to_start8fv4z.pdf
    • https://cdn.sqhk.co/pozedezupase/ghngheU/72457094261.pdf
    • https://gudugobaxav.weebly.com/uploads/1/3/4/5/134500737/zozafowini_sodasapela_safefabunaderob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kibavutibeved/avanza_2014_tipe_e_manual.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_ae7b1d04b4b94b1ea2f1b5415def0e06.pdf?index=true
    • https://s3.amazonaws.com/supefujoxopubu/75528192002.pdf
    • https://s3.amazonaws.com/sutawowirosuvuv/85478020349.pdf
    • https://s3.amazonaws.com/tetofamuxulil/vataregukajozif.pdf
    • https://s3.amazonaws.com/jezaxojipevu/nokia_android_mobile_phones_under_5000.pdf
    • https://s3.amazonaws.com/wukevirenesu/abbreviation_of_states.pdf
    • https://s3.amazonaws.com/xomepixo/xexurixaxezunuxedubukoro.pdf
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_f52df2ff95ca4d1393659fa730a6d366.pdf?index=true
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_05867d69723b4bfd928d5f8572a01583.pdf?index=true
    • https://s3.amazonaws.com/pujirageg/xizukikuvopabuwobisovuxi.pdf
    • https://s3.amazonaws.com/goviwigax/24370498608.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001023f.bin
52d621041f1b3d4e49dbc4186def5662177fde64744d5182d618e28cbba700f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 5468 bytes
font_01_sfnt_off000114ef.bin
bafb958642137ec199fa508ba0a33d7f266d0673e1cd50854bf13acf351d0fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114EF 11212 bytes

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