Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7afc747d6d148c…

MALICIOUS

PDF

70.4 KB Created: 2021-03-27 14:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07cdb7fe830b4ef5a33f57307046c0c6 SHA-1: 8f986809b7d025dc9e56f02ef0876b257b627c1a SHA-256: ff7afc747d6d148c030e1c64b777d24a595ca72197a3d467c4b9bbeb33b47694
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'mezovuduw.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains strings that suggest a lure related to 'Roblox song id'. No scripts were extracted, but the presence of the malicious URI strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=roblox+song+id+for+bad+guy
    • https://cdn.sqhk.co/wojomisew/aGhhjdj/45777511793.pdf
    • https://cdn.sqhk.co/lopijikuvi/ijgggjd/anemia_falciforme_dietoterapia.pdf
    • https://cdn.sqhk.co/purilusevike/kidjeRn/leopard_lounge_hair_beauty_salon.pdf
    • http://venira.su/lds_emotional_self_reliance_videos8y5wx.pdf
    • https://cdn.sqhk.co/razotefo/gijcWAY/the_legacy_apartment_homes_tampa.pdf
    • http://vkrowl.com/clicker_garage_remote_keypad_programming2p96c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/203d95ee-1869-4853-abf9-69086e858ca8/how_to_upload_to_google_photos_from_computer.pdf
    • https://uploads.strikinglycdn.com/files/73118727-081a-4be7-a21c-471a36f6e400/84277557711.pdf
    • https://uploads.strikinglycdn.com/files/2692c82c-3cee-4e6e-964b-09e980dde207/logitech_harmony_880_advanced_universal_remote_control_manual.pdf
    • https://s3.amazonaws.com/gizonukorad/how_do_i_start_a_home_bakery_business_plan_for_a_nursing.pdf
    • https://uploads.strikinglycdn.com/files/3674cc72-390f-4c0a-bf27-fe66d044d573/how_do_i_set_time_on_citizen_eco_drive.pdf
    • https://uploads.strikinglycdn.com/files/e0cac2af-6e78-4cac-9400-318fe4b12e42/91093268873.pdf
    • https://uploads.strikinglycdn.com/files/e7aed4f4-8d42-4ca2-bbb9-5e483be0a67d/how_long_does_dewalt_20v_battery_last.pdf
    • https://uploads.strikinglycdn.com/files/73c3c596-2193-4fa6-8afe-0ca4eee0f760/what_does_a_broken_horse_mean.pdf
    • https://s3.amazonaws.com/gasodamuza/39847717253.pdf
    • https://s3.amazonaws.com/tudawufed/spring_resttemplate_set_auth_header.pdf
    • https://uploads.strikinglycdn.com/files/e06d2db8-52d0-4600-b4b7-21e2533540c2/10669744138.pdf
    • https://uploads.strikinglycdn.com/files/4e86b06f-a41b-475c-ab8b-588d6c39ba22/how_to_build_trust_within_your_team.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_off0000d4bd.bin
7820eaf66f7c8587c8b68aba620f8677fe6d391b694040a02fec87677dd74ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 5392 bytes
font_01_sfnt_off0000e72e.bin
2a8c74b90c0dc199bf588bb501fc32c6a2714babab8c1a6ab49bd54162ad0e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 10572 bytes

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