Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f125aba2d804779…

MALICIOUS

PDF

77.8 KB Created: 2021-03-29 23:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 76123200fdff751dcfc888b18386d634 SHA-1: 56e6ecebe5acff3c0aab02b4f961622351dde48b SHA-256: 0f125aba2d8047793ced129657fb6bbb0cd7130ffbd4ffa9480660768822f6a9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=best+free+audiobook+player+app+for+android PDF link annotation
    • https://cdn.sqhk.co/furigelo/ephcggZ/ac_dc_ampere_meter_price_in_pakistan.pdfIn PDF document text
    • https://cdn.sqhk.co/duravukikemo/hUij1id/planet_of_the_apes_last_frontier_ps4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/mikujudo/gccfafU/interpersonal_communication_skills_defined.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/715423.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/gg8hjzb/36632488721.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/geopgfL/healthy_living_tips_for_mental_health.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/Bm6ehi6/traffic_racer_cheats_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wokuvaxevaji/dUjjvDU/rizin_ff_live_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/cqUidhi/11395738749.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/2ba8fc2a2.pdfIn PDF document text
    • https://cdn.sqhk.co/retirijozi/dhj2hb8/toy_claw_machine_game_play_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad5f25e-967e-4342-a30d-4e0cfd983423/dewalt_3400_psi_pressure_washer_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1aaf07c-1ed5-43a9-b638-9b719ac806c2/defensive_driving_test_answers_2020_fiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353e3efa-d631-4186-ab88-cc348b181a07/what_are_some_patient_safety_initiatives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8638caed-d9af-4caf-8ad2-9d9e48ed54a1/47335289361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6bdf01a-9536-451c-b01c-68836b222004/78693391510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0a0e03-7bfd-45bc-9a08-a03d7a522a84/palifodedukevanagis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d41e02-d45d-49bc-b882-1deae1222a0b/52440760795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/369c6e04-e035-459e-a01e-9b7541e2e16d/can_an_evaporation_line_be_bright_blue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d4575f-3320-453b-b9c5-cbc747059b56/nugerok.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 5392 bytes
SHA-256: 66171f8c2dd79349f6d450cea84a3172759baf705997f81bb7abe355a416c47f
font_01_sfnt_off00010517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10517 10812 bytes
SHA-256: 4c421635d770b39ef9eda4a11eaa0ad31805ac16d3d9a7fa18f6e43c808410a6

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