Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9f4e734dd9daad…

MALICIOUS

PDF

70.7 KB Created: 2021-05-19 23:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72c37082cadea2f56fe3c6ff3ca11af3 SHA-1: 8272996ac380a3092e8265ee85fc54f7d16cc37d SHA-256: 3b9f4e734dd9daad29b56921fcb03f01cda1a0fa5d010798ec9d25e89019ad2a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that is not confirmed as benign, suggesting it is used for malicious redirection or payload delivery. The document body, though heavily obfuscated, contains text related to free downloads, aligning with a phishing or social engineering lure.

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://xezojetit.ru/strik?utm_term=agar+zindagi+ho+tere+sang+ho+mp3+song+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/piwanisaj/lebatufosorokanir.pdf
    • https://s3.amazonaws.com/wezukep/lg_hbs_900_reset.pdf
    • https://s3.amazonaws.com/kosamupim/lewosominubasevinopisob.pdf
    • https://uploads.strikinglycdn.com/files/4f6feb8c-6e73-4429-a638-4e90eccd5f27/how_to_reset_mileage_odometer.pdf
    • https://uploads.strikinglycdn.com/files/278722d7-a2c6-469e-a813-01900395a72f/90075046597.pdf
    • https://uploads.strikinglycdn.com/files/8d552bed-b991-465e-b44d-49c3402598e5/can_you_still_use_wii_virtual_console.pdf
    • https://s3.amazonaws.com/safenalavojuwu/becoming_jane_full_movie_480p.pdf
    • https://uploads.strikinglycdn.com/files/cb16f9c0-77c2-45e7-9d4c-f7975422efb2/wordpress_themes_templates_free_download.pdf
    • https://uploads.strikinglycdn.com/files/583506b9-ba77-4b78-bcc9-58bb082ea0ff/alto_shaam_oven_manual.pdf
    • https://s3.amazonaws.com/betefowubevat/69543312544.pdf
    • https://uploads.strikinglycdn.com/files/1612f76c-c2cc-425b-81f1-5b44b19cb3b5/inorganic_chemistry_research_impact_factor.pdf
    • https://s3.amazonaws.com/viromibukoleliw/call_of_duty_2018_free.pdf
    • https://uploads.strikinglycdn.com/files/3ef424d5-f625-442e-9e86-6a8bc2e27217/analog_and_digital_circuit_design_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/9f2fd116-53f5-48b2-8ebf-0dd15ee8762b/junior_internal_auditor_jobs_in_south_africa.pdf
    • https://s3.amazonaws.com/pozokimepe/what_station_plays_old_country_music.pdf
    • https://s3.amazonaws.com/fajeloninesitel/xufimakijaw.pdf
    • https://s3.amazonaws.com/nigimul/53171562777.pdf
    • https://s3.amazonaws.com/potamotaz/zanusunexulawizemativapeg.pdf
    • https://uploads.strikinglycdn.com/files/351dacc0-e5e7-4963-a762-8b1835d978d7/john_dewey_educational_philosophy.pdf
    • https://uploads.strikinglycdn.com/files/e031d69e-c4dd-4c43-b788-25225659d957/what_is_canon_business_process_services.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_off0000d322.bin
17ca325023b2f80a43f492215769e3749abd51f4ebb5012f3910e49121e0163e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD322 5748 bytes
font_01_sfnt_off0000e6af.bin
8a4578174a0b1d684b98e61269de893fd1c952dd2aa54c3c40b70c7fb4dfa66a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 11264 bytes

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