Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4c0ac9adc67c95…

MALICIOUS

PDF

75.3 KB Created: 2021-04-06 06:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb90a68f7b134f10231516b14abfd412 SHA-1: 7b2bf790a12dc374fa423ffb0b2a7ef4d14a6392 SHA-256: 0d4c0ac9adc67c9504313ba4bbaeb2889613b4042bfb35507ffeeea524f503a8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'golowaki.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference a game, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/wix?keyword=strike+force+kitty+league+2+unblocked
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fe9803983396.pdf
    • http://fruktovik.com/nasal_cavity_bones_mnemonicmvab9.pdf
    • http://twirlini.com/yellowstone_cast_season_3_episode_9_recapbebyq.pdf
    • http://g2am2e.xyz/how_to_play_the_guitar_for_beginners_step_by_stepqrte8.pdf
    • https://cdn-cms.f-static.net/uploads/4412173/normal_6041316eb1a05.pdf
    • http://zokidinodajives.getenjoyment.net/88343741923.pdf
    • https://cdn-cms.f-static.net/uploads/4416930/normal_602d6d8836251.pdf
    • http://test123test.xyz/664787735121gwc0.pdf
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6052d27e41371.pdf
    • http://rinujajija.getenjoyment.net/spell_your_name_workout.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0ed30ddb-3df1-4505-9e4e-3e87fc6d20ea.filesusr.com/ugd/f043c1_e8d38e32e39c435796c3f8c45f8a80a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5b80a5de-dcd1-4648-a8e5-115d5de327c4/gekifezakatokipuwu.pdf
    • https://uploads.strikinglycdn.com/files/4004c76d-22c9-4bab-a218-0dff295fdb53/takorivejeniru.pdf
    • https://s3.amazonaws.com/figugipopar/kuwosutix.pdf
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_ef5ca47a9c6c42f0bb681470a0672725.pdf?index=true
    • https://s3.amazonaws.com/dowesitobuga/agile_roles_and_responsibilities_matrix_template.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_0caea37aa98c4fecb4ac1b6fc72f6dbe.pdf?index=true
    • 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_off0000e735.bin
112831111114568c6170dbd0c95e666e165a8c4cd826888efc9a2b7699778c61
pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 5552 bytes
font_01_sfnt_off0000fa3a.bin
ca6c721b11b6d1cf77bac1e93176212d166a0b16217331d878d8662c84f1d91e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10624 bytes