Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4904f59eb7c2a92…

MALICIOUS

PDF

86.3 KB Created: 2021-03-27 10:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f292529ca357a5ceaefe946c9497b9c1 SHA-1: 58700055bfb40e0d2228b0c0e7c0094d18e20a44 SHA-256: b4904f59eb7c2a92ace10b6b31e89f6c66de08709acc29fc8f902844cf7e979e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website seemingly related to search results, likely a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to trick users into visiting malicious sites, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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=best+manual+sweeper
    • http://dududuw.mypressonline.com/kowefifobimawugikazanen.pdf
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5ff9072721577.pdf
    • http://topplafond.xyz/chamberlain_liftmaster_professional_1_2_hp_remote_setup9xr8h.pdf
    • http://melowew.scienceontheweb.net/anticancer_diet.pdf
    • http://psyhologrzn.ru/2878359501uyfh2.pdf
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fdb7789d4736.pdf
    • https://cdn-cms.f-static.net/uploads/4446174/normal_601b0f479e0ca.pdf
    • http://help-verification.com/bedimigipileninfmfnz.pdf
    • http://yoga-fitness.space/human_body_systems_flip_bookpbb9a.pdf
    • http://fredo.bike/rerufesapwfv0m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8258b5b-a659-447a-9152-f5ec3fbafc3e/16584387992.pdf
    • https://uploads.strikinglycdn.com/files/a473e944-9d23-42fb-9339-bc43b40b9897/conflict_resolution_skills_for_couples.pdf
    • https://uploads.strikinglycdn.com/files/30f5c634-f30a-4cc9-a81d-5371c68162cd/narolo.pdf
    • https://uploads.strikinglycdn.com/files/e9affce9-7678-492a-88d5-b21033564b97/merit_badge_counselor.pdf
    • https://uploads.strikinglycdn.com/files/d65c5b64-93c9-4dcd-8164-c8607e631a7a/night_owl_security_cameras_with_sound.pdf
    • https://uploads.strikinglycdn.com/files/cdc7c14a-b724-4c8b-ba71-c1de2cabaca2/26362697885.pdf
    • https://uploads.strikinglycdn.com/files/d751697e-7a23-442c-8b5b-27a37ce9c87d/kitchenaid_artisan_mixer_pistachio_best_price.pdf
    • http://gibidapasajug.atwebpages.com/atrial_fibrillation_the_latest_management_strategies.pdf
    • https://uploads.strikinglycdn.com/files/5a0d9752-777a-4693-ab4a-074af1fddd22/93270112590.pdf
    • https://uploads.strikinglycdn.com/files/dc220b27-e0d7-45f2-bf3a-f269e701c305/mesigixevemosigo.pdf
    • https://uploads.strikinglycdn.com/files/f4d2b934-f93c-40ba-9443-069cf6e3f6c2/basic_math_skills_assessment_printable.pdf
    • https://uploads.strikinglycdn.com/files/300184ea-779b-4e43-b141-3e7546f63216/lg_smart_inverter_fault_codes.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_off0001152a.bin
ff689eb4ba7479ccd39928deab25996e2577e96631c58d85daab831654cf0ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 5104 bytes
font_01_sfnt_off00012682.bin
fd4c45b77248f3dbb9f7053bfa25bcf48a14b96fb39e8b46b6b772d494d0de28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12682 11184 bytes

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