Malicious PDF — malware analysis report

Static analysis result for SHA-256 650e9009870b8f5d…

MALICIOUS

PDF

81.8 KB Created: 2021-03-16 03:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6483a7e0d28f2e0fc7fda325255dc699 SHA-1: d3e1cacbd7b64990b32083aac5a4113a3a3bd781 SHA-256: 650e9009870b8f5dcdf3be5df0787c6b429bf446e376d118d94b42091afb2e37
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 critical heuristic flagging it as Pdf.Phishing.Trojan. An external URI pointing to 'resalured.ru' was extracted, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, but the presence of embedded URLs and the overall detection profile indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=cuantas+horas+hay+en+un+a%25C3%25B1o
    • http://zijafanovidiz.sportsontheweb.net/14502720215.pdf
    • http://kevifiregerufug.scienceontheweb.net/6573132135.pdf
    • https://cdn-cms.f-static.net/uploads/4366055/normal_602e992c14e4e.pdf
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60415e2059ddd.pdf
    • https://cdn-cms.f-static.net/uploads/4415304/normal_60464ba58a8e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zumomasugipeno/arpav_temporali_apk.pdf
    • https://uploads.strikinglycdn.com/files/a1ad6f5f-f9cb-4a01-87ad-9186a7407708/plantronics_voyager_legend_connect_to_laptop.pdf
    • https://uploads.strikinglycdn.com/files/d120a604-0437-4ebd-99af-b27b5ab46169/sefijekepiraxexo.pdf
    • https://s3.amazonaws.com/zidosozawok/tintin_game_2020.pdf
    • https://uploads.strikinglycdn.com/files/4260b89a-820c-42d9-9c08-6728dd107035/breckwell_pellet_stove_control_board_repair.pdf
    • https://uploads.strikinglycdn.com/files/bc197c02-ae26-4d99-a5e5-5b786f164e29/viva_water_dispenser_hot_water_not_working.pdf
    • https://s3.amazonaws.com/zuguvoxoki/10938045833.pdf
    • https://uploads.strikinglycdn.com/files/dba3c85a-4375-490f-abf8-af5837955718/berenstain_bears_books_amazon.pdf
    • https://uploads.strikinglycdn.com/files/d6e220df-6def-47a5-b83c-38d33b119182/rain_bird_5000_mpr_nozzle_chart.pdf
    • https://uploads.strikinglycdn.com/files/1afee81b-c42f-4bb3-8b60-ff88476a62a9/janonexoxa.pdf
    • https://s3.amazonaws.com/pafiganovavi/prague_airport_transfers_get_your_guide.pdf
    • http://kuxubakelixuzot.atwebpages.com/61464286357.pdf
    • https://uploads.strikinglycdn.com/files/c7c7ee3f-f1e1-48bc-acf4-b4c5e01d1b59/sofobowekivowaxijirug.pdf
    • https://uploads.strikinglycdn.com/files/a63f7ddb-7281-4fb9-871a-346523943d10/sifekamebizejalasaruf.pdf
    • https://uploads.strikinglycdn.com/files/06e79a29-f397-4996-869b-de0f9d65d13a/living_everyday_zen_charlotte_joko_beck.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e707.bin
e815543c58beada3a5d5c6a03fc34035e5d20215fbd0e06771fe2bd383b84f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 4960 bytes
font_01_sfnt_off0000f79a.bin
e79f61e153b5100dc84a88391698078ed4d62f2230e67c3e577f5cbca81ae5ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 13136 bytes
font_02_sfnt_off00012287.bin
00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12287 16140 bytes

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