Malicious PDF — malware analysis report

Static analysis result for SHA-256 0479501b4882e510…

MALICIOUS

PDF

77.9 KB Created: 2021-05-29 14:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4557981d2e37feedf6628bccac46e939 SHA-1: d2eb832c144bddcacfb75ebed0a030d7366c1e5d SHA-256: 0479501b4882e510b60a7afdb21ed34e39ae50db408d4911aa5f75a970104759
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL points to a domain that appears to be hosting the malicious content, likely disguised as a free download for a technical manual. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=aiag%2527s+fmea+manual+4th+edition+free+download
    • https://static.s123-cdn-static.com/uploads/4486983/normal_5ffba633742f7.pdf
    • https://cdn-cms.f-static.net/uploads/4467322/normal_6043f91f3600e.pdf
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60375171cb552.pdf
    • https://cdn-cms.f-static.net/uploads/4402964/normal_603076ce2943f.pdf
    • https://cdn-cms.f-static.net/uploads/4422368/normal_606b32ebc353b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f6b3635-690b-4ab3-953d-8aa8ef4f448f/how_hard_is_the_isa_arborist_exam.pdf
    • https://uploads.strikinglycdn.com/files/0d08fd96-4891-4318-81bc-ae5e396ac0ca/mosquito_magnet_patriot_plus_attractant.pdf
    • https://uploads.strikinglycdn.com/files/e9afde5f-022f-477b-96da-b4cacbe2baf4/atwood_marine_water_heater_manual_reset_button.pdf
    • https://uploads.strikinglycdn.com/files/ed63c3ef-878e-41a0-9e69-99a524f7de8c/bride_of_chucky_full_movie_tamil_dubbed_free_download.pdf
    • https://uploads.strikinglycdn.com/files/cc4fae20-9dec-4c7a-ab5e-d5e3d6a83fa3/panchatantra_stories_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/b2587bad-2817-448b-a703-88cc561f0d60/how_do_you_charge_a_flip_video.pdf
    • https://uploads.strikinglycdn.com/files/6289a466-a1f5-4c92-997e-afa044e4c6e2/kegirabijonakevadok.pdf
    • https://uploads.strikinglycdn.com/files/8c6e9a2b-2456-459f-b245-efaac18f77c4/prentice_hall_gold_algebra_1_answer_key_form_g_chapter_7.pdf
    • https://uploads.strikinglycdn.com/files/c5d430a8-38d1-4860-b503-252d15d4c81b/what_products_does_pg_make.pdf
    • https://uploads.strikinglycdn.com/files/4c1d4c5a-275f-475d-b494-dd143433f92b/wewetidesujufakij.pdf
    • https://uploads.strikinglycdn.com/files/e4924c1f-1025-4798-8280-36d4eeb98850/nasegelebadulewev.pdf
    • https://uploads.strikinglycdn.com/files/c2085f98-88b1-4cbc-aa44-cdb32404c20b/what_can_you_do_with_a_ham_radio_license.pdf
    • https://uploads.strikinglycdn.com/files/fe3b1c87-2a4c-40db-8f83-ea16fefa26c5/sat_math_questions_khan_academy.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_off0000f32d.bin
9a10607f32ee29de67d1de72eccabfc9fbdae549b00b25bb71f34bd5b11589f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 5524 bytes
font_01_sfnt_off000105e8.bin
b17c7f3aecd57dbfedb52c3ae5a9c4eb39cfb674f18f1cd0b21e272d67c823f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E8 10632 bytes

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