Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8ac8ca0371082d…

MALICIOUS

PDF

80.2 KB Created: 2021-05-07 09:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2212a15e8eec14e4419139c516549632 SHA-1: 88f51ac48e0892f2472518333d0e501215db7fb3 SHA-256: 3f8ac8ca0371082de657e2142e593bd6c45cca6189a671e41bb0a566b8c7fb68
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to host a malicious payload or phishing page. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of the external URI and the malware detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=canon+canonet+ql17+giii+battery
    • http://zaneralisobiwi.22web.org/file_tidak_bisa_dibuka_pada_android.pdf
    • http://pamuxixa.iblogger.org/dovexogederuwuvisitof.pdf
    • http://milesatel.mygamesonline.org/blood_bowl_2_best_skills_catcher.pdf
    • http://felulam.22web.org/how_to_activate_p_ebt_card.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/67ac854a-9843-40b0-b0bd-31e29a648a01/osha_construction_safety_training.pdf
    • http://rupeguv.epizy.com/phonetic_transcription_worksheets_with_answers.pdf
    • https://s3.amazonaws.com/nitatotol/ionic_bonding_practice_problems_with_answers.pdf
    • http://jarepumemaxi.onlinewebshop.net/use_of_audio_visual_aids_in_teaching_english.pdf
    • https://s3.amazonaws.com/rovuweraja/peruvatalolugefuzef.pdf
    • http://temipaz.epizy.com/7884362746.pdf
    • http://woxenebifa.rf.gd/lejelewed.pdf
    • https://uploads.strikinglycdn.com/files/09bd67e6-2876-4697-acb6-1172f7cde4f4/remurepolizakur.pdf
    • https://uploads.strikinglycdn.com/files/e592cb1b-0c84-419b-927f-82cde384d550/disolucion_normalidad_formula.pdf
    • http://sagawojuros.rf.gd/how_to_replace_a_lost_south_carolina_drivers_license.pdf
    • https://s3.amazonaws.com/webipejonavuv/kinetixevujimesoriviw.pdf
    • https://s3.amazonaws.com/xasovewipeje/xalafipogawo.pdf
    • http://zapemapozo.rf.gd/angeles_y_demonios_dan_brown_libro.pdf
    • http://boribasumagit.epizy.com/dezurediragekujizomunuw.pdf
    • https://s3.amazonaws.com/tojabixefova/rapafan.pdf
    • https://s3.amazonaws.com/wiremeresegikon/c_form_format.pdf
    • https://uploads.strikinglycdn.com/files/8b5d30da-e7a4-4f21-8c76-1433a9021d7c/vubetakazokutekakex.pdf
    • https://s3.amazonaws.com/vukujidor/quotes_about_success_and_hard_work.pdf
    • http://nabasuxogakuwet.epizy.com/spoken_english_tutorial_for_beginners.pdf
    • http://tuminexozuvino.atwebpages.com/20516544725.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_off0000f88d.bin
2c676775ea46c0282d5a7802335d40c2ac783a4a9b66bc7ca852bdc7591787a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 5192 bytes
font_01_sfnt_off00010a58.bin
58dab33c5387c5bb3ccc7e8b9e50d2f3ef99210fc81423df490c8fe7066921f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 12028 bytes

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