Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0b4d238fc7434e…

MALICIOUS

PDF

84.0 KB Created: 2021-04-01 19:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4eaa589c48a582f77522d75a4422460d SHA-1: 42a26c3ede636f20bbab8f49159bb3fe7aeac78e SHA-256: 2d0b4d238fc7434e1cd35e9144226a7892217961d9dc9746abb9aad57b5b006b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'short story prompts historical fiction', suggesting a social engineering tactic to mask malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=short+story+prompts+historical+fiction
    • http://pixunune.sportsontheweb.net/58006321386.pdf
    • https://cdn.sqhk.co/sejujona/H9Zjbjd/celebrity_call_prank_jokes_simpsons.pdf
    • https://cdn.sqhk.co/rifusofuwedi/iejclif/87139985238.pdf
    • http://kobazugipodiv.medianewsonline.com/90902923477.pdf
    • https://cdn.sqhk.co/sedazozesufu/Dhgiepi/wadabiwodutubuvorebabug.pdf
    • http://jijuduli.mywebcommunity.org/sudufi.pdf
    • https://cdn.sqhk.co/dutebevon/kX9kHqr/29254492117.pdf
    • http://lomilinixigal.mypressonline.com/7266123330.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7eb9b892-5ed2-42cc-bafd-5a6b13d4eb2c/what_is_the_function_of_a_piston_in_an_internal_combustion_engine.pdf
    • https://s3.amazonaws.com/wovedukevikov/what_is_the_major_theme_of_the_play_antigone.pdf
    • https://s3.amazonaws.com/regufojalojaza/31477438824.pdf
    • https://uploads.strikinglycdn.com/files/ff84f1d6-546b-47d1-95fa-5885bb49f41a/easy_way_to_tie_fg_knot.pdf
    • https://uploads.strikinglycdn.com/files/68f5ebaa-0d55-4d47-bb48-1f10b686e99a/20301033108.pdf
    • https://uploads.strikinglycdn.com/files/d4e1e55d-5eca-4e33-baca-8d2f304e6ada/contrato_arrendamiento_lote_rural_colombia.pdf
    • https://s3.amazonaws.com/kelageketisefuv/accel_world_light_novel.pdf
    • https://s3.amazonaws.com/patotale/2012_toyota_highlander_limited_v6_specs.pdf
    • https://uploads.strikinglycdn.com/files/a23391d3-395c-4bd2-b135-7356b1d57262/34344839247.pdf
    • https://uploads.strikinglycdn.com/files/4e353d06-7973-487a-ad14-b4bcb4a25e4c/james_and_the_giant_peach_summary_chapter_2.pdf
    • https://s3.amazonaws.com/poguvelefa/64720871089.pdf
    • http://nujugeteteda.myartsonline.com/base64_string_to_angular_2.pdf
    • https://s3.amazonaws.com/wuxupewu/30316464130.pdf
    • https://uploads.strikinglycdn.com/files/22f8b7b9-d482-4c78-bdec-f3f97a1e7126/55837392278.pdf
    • https://uploads.strikinglycdn.com/files/a5737b6c-78bb-4d2b-aeb9-f4406a4a7e2b/how_to_eat_when_trying_to_lose_weight_and_gain_muscle.pdf
    • https://s3.amazonaws.com/fazujo/56736209306.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_off00010afb.bin
822ab52fcc04e1c395d5cb00225fed42a0b57789578c4d2e2a84c31229ba6181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 5460 bytes
font_01_sfnt_off00011d6f.bin
2613556bf2a44dbd5f0426c03192e44b7c8c70c6df81a2e46b37115e3ea4ae8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6F 10704 bytes

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