Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4dc59f7f7e3ad42…

MALICIOUS

PDF

107.7 KB Created: 2021-03-19 00:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95da3aa33b5cd1c1a32f7e7401cd9b92 SHA-1: dc5db7970c3dbb2f5e473cedeb58dc5da379e95e SHA-256: c4dc59f7f7e3ad4202e352d5940e24c248eab4c6b0f5aaee107b0cc52422b6eb
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or phishing page. The presence of multiple unknown reputation URLs further supports the malicious intent.

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://mezovuduw.ru/wix?keyword=portland+tool+library
    • http://rrrrkkkkk.space/kodafaferutozajcvwkm.pdf
    • http://sarhello.online/dungeons_and_dragons_dungeon_master_guide_free_download9gohc.pdf
    • http://itwomen.space/2000_cushman_turf_truckster_manual1t7t6.pdf
    • http://bigijawiv.scienceontheweb.net/mandel_o_capitalismo_tardio.pdf
    • http://hookup154.fun/podunegafeginededikuw7am2.pdf
    • http://bidizujimon.getenjoyment.net/asuhan_keperawatan_pada_pasien_bronkopneumonia.pdf
    • http://mynasert.online/hana_wa_saku_japanese_lyricsmsylr.pdf
    • http://lemafesopeposuz.mywebcommunity.org/84851374899.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a26c469-0af7-495f-88e6-41999ff3d287/59381986206.pdf
    • https://uploads.strikinglycdn.com/files/214cebef-f98e-4474-bb3d-d50556c3e68d/constitucion_mexicana_articulo_113.pdf
    • https://uploads.strikinglycdn.com/files/c6dba643-005c-46ab-aa31-f2b3382f3d95/elite_bistro_air_fryer_accessories.pdf
    • https://uploads.strikinglycdn.com/files/a245da0e-2273-4b68-9498-c3a94ef03db4/ib_biology_textbook_online.pdf
    • https://uploads.strikinglycdn.com/files/effbd6a3-d1f0-48cb-ba9b-55b944502b73/manual_for_complex_litigation_5th_edition.pdf
    • https://uploads.strikinglycdn.com/files/acd6532b-f103-48ab-80ea-0ea61c28d5dd/sulaje.pdf
    • https://uploads.strikinglycdn.com/files/e59d6019-602c-41bc-b453-00907b75ec54/9303044451.pdf
    • http://mawidinivetobi.myartsonline.com/moto_g6_plus_wireless_charger.pdf
    • https://uploads.strikinglycdn.com/files/11efacdc-2c2e-42c2-bc3a-c7e05e7bf8fb/70056424365.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016228.bin
74d6f65655690c3442f300fb90936c150883300d3eff8917dbabea81880068c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x16228 4884 bytes
font_01_sfnt_off000172c8.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x172C8 1800 bytes
font_02_sfnt_off00017b56.bin
ec36afe7d3751be562888c5fde7ee81f5f1c494307f0d8958d4d1c32d72a1446
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B56 11144 bytes