Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d2659d79aa7369…

MALICIOUS

PDF

179.6 KB Created: 2021-03-19 23:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0b21580f51687ba2e87f2da4ce84f4 SHA-1: f14ac1624c447ce31955eac01808d1b4b2091f01 SHA-256: 67d2659d79aa73691c6fa30be4d1ffe8b08fe27ee7b0817938af13263349b7ca
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its specific lure, but the presence of the malicious URL strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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/award?keyword=antifungal+agents+medicinal+chemistry+pdf
    • https://cdn.sqhk.co/novigigexuxo/uagfwRm/66266668464.pdf
    • http://zeboxagekej.sportsontheweb.net/sociopath_next_door_free.pdf
    • http://zatoxuvisovapuf.sportsontheweb.net/times_table_printable_worksheets_ks2.pdf
    • https://cdn.sqhk.co/miburixegapu/jcihijf/roblox_games_to_play_online.pdf
    • http://rigudozefogo.mypressonline.com/nilejakodubomamoz.pdf
    • https://cdn.sqhk.co/jiloduvunilu/hhjcjnh/62416786400.pdf
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/xumizibodomejapewane.pdf
    • https://lexilovomab.weebly.com/uploads/1/3/1/4/131452944/pukim_tofibivomuluwul.pdf
    • https://cdn.sqhk.co/jeforije/jaicbX8/jeveku.pdf
    • https://cdn.sqhk.co/livaxipovage/ZTjfQsg/33121235307.pdf
    • https://bijejosuti.weebly.com/uploads/1/3/1/6/131637047/pesibazuzonap-vefotogom.pdf
    • https://vebuleme.weebly.com/uploads/1/3/4/3/134321641/504d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zoligagomuwe.onlinewebshop.net/97605996897.pdf
    • https://uploads.strikinglycdn.com/files/0f56f4e3-067d-4e70-9d30-72c9ea262d3e/ninja_blender_1500w_how_to_use.pdf
    • https://uploads.strikinglycdn.com/files/c21a0c49-3d6f-4512-8aad-3fc9a2a346fd/23125062238.pdf
    • https://uploads.strikinglycdn.com/files/975cffdf-f282-4949-897a-602673fb4f8b/tofagigasebit.pdf
    • http://xegaweripe.epizy.com/49784774358.pdf
    • https://uploads.strikinglycdn.com/files/fccb0e69-5ad9-405b-a3a2-2876a817ba60/what_can_i_eat_on_hcg_phase_2.pdf
    • http://bovuzigaratufob.rf.gd/huddersfield_bus_station_information_centre_opening_times.pdf
    • http://fovawipemezipu.myartsonline.com/binary_coded_decimal.pdf
    • http://bemabam.myartsonline.com/collections_in_java_with_examples.pdf
    • http://lunaxugezejotu.epizy.com/avant_browser_for_pc.pdf
    • http://desujiruvomeb.myartsonline.com/top_100_adjectives_in_english.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_off0002832e.bin
dfde7551ee4289e4c2bd84219c8bdc26342aed48171f36a43ef7ceb199d699d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2832E 5660 bytes
font_01_sfnt_off00029657.bin
e80ca40b47840b973edb07b83fff2e7232564e44302bc83ed02ffa8a0245e650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29657 11992 bytes

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