Malicious PDF — malware analysis report

Static analysis result for SHA-256 b833f674c157f672…

MALICIOUS

PDF

85.3 KB Created: 2021-04-15 04:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85d2355cb342df428d001cd3dc347f53 SHA-1: 1a30bf8e8460bea9f98eaced8fd2c457636b135c SHA-256: b833f674c157f672b1156c464056aabbb0f2cfb1a1be8600ca235eecf4d9ac13
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 suspicious domain, masquerading as recipe content. ClamAV and ML classifiers strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of 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://vilenefex.ru/strik?utm_term=alkaline+diet+recipes+for+dinner
    • https://cdn.sqhk.co/tezofugowura/MjaU0he/dakopefubojif.pdf
    • https://cdn.sqhk.co/porosobof/jfBpxhb/hooked_chat_stories_hack_ios.pdf
    • http://xejevojesinil.22web.org/mimuladilojokagikepigewuv.pdf
    • http://tetutunugu.iblogger.org/34696103670.pdf
    • https://cdn.sqhk.co/gufezitaxato/iiggDmN/island_tribe_3_walkthrough.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/sugosubexez/bram_stokers_dracula_movie_wikipedia.pdf
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_703fa8ff84814b73a39b05a99577441f.pdf?index=true
    • https://s3.amazonaws.com/rodiligarexo/tegazibujako.pdf
    • https://uploads.strikinglycdn.com/files/de565255-6cf3-4030-ac59-00db6a85f1ad/finding_the_volume_of_cubes_and_cuboids_worksheets.pdf
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_262e8949442c4d5cb985341d48308ae8.pdf?index=true
    • http://zusupulek.rf.gd/23278057111.pdf
    • https://uploads.strikinglycdn.com/files/5c7e8ffb-abe0-48e8-8658-4af321dea87a/xokerenasigukemamolopa.pdf
    • http://nibedob.rf.gd/past_simple_exercises_irregular_verbs_elementary.pdf
    • https://uploads.strikinglycdn.com/files/fbc0d010-caa2-4204-b8fd-a530e8f79fcc/how_to_be_a_prosecution_lawyer.pdf
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_c216d91b19714ba9acb36e83f45f6e8f.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_c37700c141a3440d9bbeb30216f656a8.pdf?index=true
    • http://fivasire.rf.gd/vusifabijibevepikivevadut.pdf
    • https://uploads.strikinglycdn.com/files/69db7433-f63d-45e5-a004-9246f0d87dfd/android_development_tutorial_geeksforgeeks.pdf
    • https://uploads.strikinglycdn.com/files/edeafb55-b2f2-44b3-ba53-2ddb2104cf16/cva_wolf_accuracy_load.pdf
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_6bd5c0af1acd4fc095bc63bb1573c0c6.pdf?index=true
    • http://wowisosanazo.rf.gd/call_of_duty_pc_game_size.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001049e.bin
f8df4202bb45af0c2f898493781863054d1fb741325d6aeeadff0d9f8aa40d6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 4988 bytes
font_01_sfnt_off00011591.bin
29b6971757cf9d6fa5e517c5b84cc5ca784567928477e44271b3689d516455c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 10672 bytes
font_02_sfnt_off0001399a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1399A 4324 bytes

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