Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f9eebd2093c801…

MALICIOUS

PDF

95.3 KB Created: 2021-03-17 14:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98357ea100d4d9ccb846f9205046ea89 SHA-1: bd7cb0b19bd43d924bd429228a1f809ad3830a6d SHA-256: 55f9eebd2093c801ca25eab2a0277fff5f182f6b5062bfcf9b4a95d25cac01e5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. ClamAV and an ML classifier flagged this file as malicious, specifically as a phishing trojan. The embedded URL likely leads to a malicious site designed to exploit the user. No scripts were extracted from this sample.

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://soxebez.ru/123?utm_term=baseband+5216+datasheet
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5fc934cb88e67.pdf
    • http://rolorutebu.sportsontheweb.net/kevemivanuvofadokuwe.pdf
    • http://jazonezamivoka.22web.org/62241843687.pdf
    • https://static.s123-cdn-static.com/uploads/4419828/normal_5ff9a7b6c5a5d.pdf
    • http://laguduzimunek.22web.org/bop_it_extreme_2_instructions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ziwemasux.myartsonline.com/tudunuvuwatoretalirujibud.pdf
    • https://uploads.strikinglycdn.com/files/98601401-b03c-49b8-ba86-f53f04e7601d/big_fish_and_begonia_theme_song.pdf
    • http://ratesedefavure.epizy.com/ponapefuge.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/carnivores_ice_age_game_free_pc.pdf
    • https://s3.amazonaws.com/juliziwojatige/how_do_i_reset_my_furnace_thermostat.pdf
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_bf3f8eeb40344303884d6727e544f389.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9bc0cdc-906a-4923-b580-7b9cf7a63b3e/joxozoselud.pdf
    • https://s3.amazonaws.com/tesasubawalozan/awb_no_full_form.pdf
    • https://uploads.strikinglycdn.com/files/17be9eeb-6f27-444a-a36f-ca3da3c644e0/how_to_do_moist_heat_with_heating_pad.pdf
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_9a661f767a284adc9fb05304d3b78bdd.pdf?index=true
    • http://purokamutene.rf.gd/18702356951.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_off000134b5.bin
e3005efc1e152e637a52f56812d4f0c09366b24b86c98b363cf6a6d7c6ce7126		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134B5 5436 bytes
font_01_sfnt_off00014736.bin
263965b2be4216c0f41dc974739885aa982c46dff14719eeff64356c8a845c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14736 11856 bytes

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