Malicious PDF — malware analysis report

Static analysis result for SHA-256 824b2a932b3b359a…

MALICIOUS

PDF

72.7 KB Created: 2021-06-09 19:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2834f592ea3455dfe57f5f77157e9b7f SHA-1: 20a2e7338a5af61a32687adef620fa7680aba386 SHA-256: 824b2a932b3b359a1daad9588125c91c97b156ed7e155f8fca0b0149e88397ba
136 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it uses an advance-fee scam lure, typical of phishing campaigns. The embedded URL, https://resalured.ru/123?utm_term=angularjs+1.+5+component+template+function, is likely part of the phishing infrastructure. Although no scripts were explicitly extracted, the PDF format can embed JavaScript for malicious actions, and the presence of external URIs suggests an attempt to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/123?utm_term=angularjs+1.+5+component+template+function
    • https://cdn-cms.f-static.net/uploads/4413566/normal_602e8112f21b1.pdf
    • https://static.s123-cdn-static-d.com/uploads/4426832/normal_60b2a098b9049.pdf
    • https://cdn-cms.f-static.net/uploads/4476924/normal_60335fada4ccd.pdf
    • https://cdn-cms.f-static.net/uploads/4385230/normal_6039dfdc32a98.pdf
    • https://cdn-cms.f-static.net/uploads/4470019/normal_5fdb3f2674d9d.pdf
    • https://cdn-cms.f-static.net/uploads/4391925/normal_6018e61d839c6.pdf
    • https://static.s123-cdn-static.com/uploads/4447101/normal_5fc6c66dd95c5.pdf
    • https://static.s123-cdn-static.com/uploads/4407996/normal_5fdcd3599a447.pdf
    • https://cdn-cms.f-static.net/uploads/4415291/normal_6042df257eec8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nugewus.pbworks.com/f/simewabozoden.pdf
    • http://pagorevet.pbworks.com/w/file/fetch/144808800/golavuf.pdf
    • https://uploads.strikinglycdn.com/files/68a6eefc-0bd3-4b92-b7ed-40d18b4ca71d/percy_jackson_sea_of_monsters_book.pdf
    • https://uploads.strikinglycdn.com/files/6b37fa44-0266-4164-9662-412e47f5fc1e/aircraft_maintenance_officer_usmc.pdf
    • http://tejudafo.pbworks.com/f/fisicoquimica_castellan_2da_edicion.pdf
    • https://uploads.strikinglycdn.com/files/fb2ce349-b352-4cf3-a246-82e153f0cfe0/how_do_you_create_a_new_line_in_excel_cell.pdf
    • http://wojipag.pbworks.com/f/6207652505.pdf
    • https://uploads.strikinglycdn.com/files/7b2225fb-a21e-444e-a859-a7da7a078f04/wafopumeziwugimalu.pdf
    • https://uploads.strikinglycdn.com/files/69c72ac0-4c0f-4aa3-a119-938b0cbdac09/just_basic_tutorial.pdf
    • http://niluputevi.pbworks.com/w/file/fetch/144591138/which_elements_in_the_periodic_table_are_inner_transition_metals.pdf
    • https://uploads.strikinglycdn.com/files/3a4d222a-c196-4c9d-9543-f3333bc00124/2223798854.pdf
    • http://fukibaso.pbworks.com/w/file/fetch/144959754/nurse_manager_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/8cdd6d11-5ca9-4605-8fae-df50c2c60691/how_to_work_farberware_air_fryer.pdf
    • https://uploads.strikinglycdn.com/files/4ac3c8d0-931b-4e5a-a51e-a1500a5bf453/why_is_my_samsung_dryer_not_drying_properly.pdf
    • http://dufogeruzipu.pbworks.com/f/what_are_the_two_methods_of_safety_wiring.pdf
    • https://uploads.strikinglycdn.com/files/094c82b3-4b2c-4745-8c50-12a9dd7b74e7/construction_site_office_manager_job_description_nz.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_off0000dad6.bin
43b1c377d7d8e8f0a6a25b3455807d419b3f366030a12309df130c86d28192cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 5608 bytes
font_01_sfnt_off0000edf1.bin
49de092c4449785f59b35a12eb9ab1267a3f04141a33e23392657f2f7265fb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 11392 bytes

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