Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bba9e2009c1bd0…

MALICIOUS

PDF

77.2 KB Created: 2021-05-14 19:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e6ee92de7d8c54a8c317d963690b18a SHA-1: e29173f7b6c9fa8fe255a78755607d51004968ae SHA-256: b5bba9e2009c1bd0eaac1205a367b1f157e125e8e83ed0f37043968b5e7c3208
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely the primary delivery mechanism for a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'Crown xls 2502 specifications'. No scripts were extracted, but the presence of an external URI strongly indicates a phishing or malware download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://resalured.ru/strik?utm_term=crown+xls+2502+specifications
    • https://cdn-cms.f-static.net/uploads/4366306/normal_60301b6729756.pdf
    • http://wofomeko.22web.org/32085490578.pdf
    • http://lewodazegozi.iblogger.org/1742889272.pdf
    • https://cdn-cms.f-static.net/uploads/4401559/normal_603030d29f9a4.pdf
    • http://bozakotoluzi.iblogger.org/31464626075.pdf
    • https://cdn-cms.f-static.net/uploads/4367944/normal_60407bcb05e0c.pdf
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5ff45b43a88a9.pdf
    • https://cdn-cms.f-static.net/uploads/4474985/normal_602bed8f9cb66.pdf
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5fc7117a2a0df.pdf
    • https://cdn-cms.f-static.net/uploads/4449629/normal_604d483d113b3.pdf
    • https://cdn-cms.f-static.net/uploads/4446270/normal_60109274554a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e0319b7e-2067-43d7-9ce3-49b6344becda/98327192594.pdf
    • https://uploads.strikinglycdn.com/files/52b244dd-aa8a-4e33-a0e4-ffd59af254e7/wurenizumowavulif.pdf
    • https://uploads.strikinglycdn.com/files/95e537b7-6d87-4dd9-9a19-d6b02afc3c04/51675577084.pdf
    • https://uploads.strikinglycdn.com/files/d3bdcc88-d9e0-421d-befe-6052a9211735/how_to_set_a_rain_dial_sprinkler_timer.pdf
    • https://uploads.strikinglycdn.com/files/60b8aea8-6ad2-46d6-8d82-fad3d9b3fe95/drama_play_scripts.pdf
    • https://uploads.strikinglycdn.com/files/3557f673-4b72-4b5a-86ed-5c4d8b4f6f45/tefabunudakuxupaz.pdf
    • http://pojeborozagab.rf.gd/history_and_development_of_badminton.pdf
    • https://s3.amazonaws.com/nagev/tivimupuferevij.pdf
    • https://s3.amazonaws.com/mokuwanibof/free_cleaning_service_contracts_templates.pdf
    • https://s3.amazonaws.com/batoragubukepo/gegifula.pdf
    • https://s3.amazonaws.com/dazifozixawus/61551157613.pdf
    • https://uploads.strikinglycdn.com/files/c096607d-0a3f-4fad-bfcb-fdd8564d91ce/electron_configuration_pogil_packet_answers.pdf
    • https://uploads.strikinglycdn.com/files/a3f45b53-31fc-40f0-897e-9583f443d7c7/94606322342.pdf
    • https://uploads.strikinglycdn.com/files/6825cbc7-dec0-44ca-b994-21f07188c726/how_to_change_transmission_fluid_and_filter.pdf
    • https://s3.amazonaws.com/muwemivumazulax/todujowira.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_off0000ed03.bin
745032db7130fdec9db570632e30fc1954e485075ce37cc591a446770c40200d
pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 5472 bytes
font_01_sfnt_off0000ffc8.bin
f76ed2d6986c6fbc0e4a95ddd559f3b91849619ad600bbcd624986b4fbdd0d5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC8 11548 bytes