Malicious PDF — malware analysis report

Static analysis result for SHA-256 28119bb2f83edc11…

MALICIOUS

PDF

82.3 KB Created: 2021-04-06 17:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c65fd73bd6ccf92738ff8f8de8d54d46 SHA-1: 75ff103e60237aa892b2fb3e76a02df79a9786ac SHA-256: 28119bb2f83edc11bbc6e6d9530e2a2485feb51a6f109c50784a4f0fccfd257e
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, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'manual cash till drawer'. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate a phishing or downloader attack pattern.

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://dafemum.ru/123?utm_term=manual+cash+till+drawer
    • http://sojarenenu.iblogger.org/learning_bass_guitar_chords.pdf
    • http://idealslimitalia-oficial.site/slow_motion_editorqa1mx.pdf
    • http://feedbacrnz.space/present_continuous_tense_worksheets_for_beginnersd3s4g.pdf
    • http://teren.fun/5th_grade_homework_online45w4k.pdf
    • http://zifufarox.getenjoyment.net/learning_strategies_in_second_language_acquisition_o_malley.pdf
    • http://xepelewatelaziv.getenjoyment.net/bifanodan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_36e2ed45c9a74aa0bf6929bc923a5bca.pdf?index=true
    • http://zunabaxuwisi.rf.gd/tigelilatuzixizuxabana.pdf
    • http://xetibewiz.rf.gd/xenabur.pdf
    • https://uploads.strikinglycdn.com/files/57b2b35e-2dcf-4c34-b38a-2f627cd25249/sayings_of_prophet_muhammad_in_urdu.pdf
    • https://uploads.strikinglycdn.com/files/4f449c02-05a1-45a4-a7ca-342c98f95a94/nenulafojeraboxeko.pdf
    • http://rugogevegemup.rf.gd/how_to_play_settlers_of_catan_with_all_expansions.pdf
    • https://uploads.strikinglycdn.com/files/f2071cac-c814-40c9-889a-b4f2fba037c4/black_and_decker_18v_trimmer_battery_charger.pdf
    • http://jilufadipubo.epizy.com/xabununopufazamimiji.pdf
    • http://venakato.epizy.com/zitataperovusidomuzamipon.pdf
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_6adb34b5d2634c42bccdd7bab3498564.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5a1b5a9c-46d9-4127-a0ad-d60d7b0cbd32/wufumepijup.pdf
    • http://rapodipowunifo.epizy.com/88864389640.pdf
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_3938e1e9f9d2497984519a40eb23feb4.pdf?index=true
    • 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_off0001037f.bin
4d960df9a32700c68e3b43169930b65b16e152026c81388fca9c8af962a12a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037F 5124 bytes
font_01_sfnt_off000114fd.bin
729cae38bb4412e07cc68e6a1f023458d1c9a6674907d5f06eec240bdaecf070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 11436 bytes

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