Malicious PDF — malware analysis report

Static analysis result for SHA-256 488d05a0e536b581…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 21:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5bcde2e33976aa7bcca4a17a0771215 SHA-1: 43d109e16db30c26582960ed3477f1169817fa79 SHA-256: 488d05a0e536b581e0e97fce051a7383c72daa7dbc0fee32610157cd0fb43ad5
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://ponafet.ru/wix?keyword=atomo+y+moleculas+definicion', which is likely a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of the malicious URL and the ClamAV detection strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=atomo+y+moleculas+definicion
    • http://lipenav.mypressonline.com/3444437167.pdf
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fe75991d08d5.pdf
    • http://fegivate.medianewsonline.com/star_trek_discovery_season_3_episode_9.pdf
    • http://zefujixa.mywebcommunity.org/xepifu.pdf
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fd34d84c9fbb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/6f69c05b-0034-442e-acf7-45921f7bf814/2714247716.pdf
    • https://s3.amazonaws.com/fasudikek/96344348131.pdf
    • https://uploads.strikinglycdn.com/files/73c155a4-b230-4780-9003-8ef8901a08bd/focus_daniel_goleman_free_download.pdf
    • http://pozidijapepore.atwebpages.com/turifigetobobesotesupitin.pdf
    • https://s3.amazonaws.com/metakibeme/lafadebokegadimozulanex.pdf
    • https://uploads.strikinglycdn.com/files/0853d4b8-451f-48a6-8755-83c12437a213/25572990568.pdf
    • https://uploads.strikinglycdn.com/files/af65527a-58f8-42c8-9d3b-7866ae2010d5/samsung_galaxy_tab_a6_sm-t580_specs.pdf
    • https://s3.amazonaws.com/titugome/judigosefenir.pdf
    • https://s3.amazonaws.com/jutenojamega/hitachi_16x2_lcd_datasheet.pdf
    • https://uploads.strikinglycdn.com/files/e0df7eac-5c0a-410c-a3bf-298acc84ae36/tuwotuludufobajuwav.pdf
    • https://s3.amazonaws.com/jusuberu/amd_graphics_driver_windows_10_free.pdf
    • https://uploads.strikinglycdn.com/files/34753987-3ad9-43dd-8b38-10c62d92ac07/kitchenaid_pro_600_bowl.pdf
    • https://uploads.strikinglycdn.com/files/c7e47728-050e-40e4-a5aa-8e870f73b1bd/google_cloud_machine_learning_engine_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/b8605249-feec-4a76-be3f-167636d20b35/samsung_un32n5300afxza_1080p.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_off0000e8ce.bin
8341fc2520fc9e5ed76ab45edc66c5be34893df952e59954cda321c9f2c3719c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 5044 bytes
font_01_sfnt_off0000f9f0.bin
861bf83a1414dac819358acc573507975d7b6db576826adee82f8e7a29c22c17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 11892 bytes
font_02_sfnt_off00012035.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 4324 bytes

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