Malicious PDF — malware analysis report

Static analysis result for SHA-256 23f37382ad4dbf85…

MALICIOUS

PDF

72.8 KB Created: 2021-06-03 13:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec38d7286c5313975c57e99741e6e04 SHA-1: d27486a99062e483f21b74c8069f1231098d79e3 SHA-256: 23f37382ad4dbf857f6f47be5dc2dc81042528b0751db9c0b9c75ae39fbc76e9
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that directs users to a website, likely for credential harvesting. No scripts were extracted, but the presence of an external URI suggests a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=practice+test+solving+systems+by+graphing+substitution+and+elimination
    • https://cdn-cms.f-static.net/uploads/4414166/normal_6059163dca3e4.pdf
    • https://zemojedi.weebly.com/uploads/1/3/5/3/135333580/6065435.pdf
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5fedcafb61883.pdf
    • https://static.s123-cdn-static.com/uploads/4485926/normal_5fcd57c74671e.pdf
    • https://cdn-cms.f-static.net/uploads/4420036/normal_6042c3cc95296.pdf
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/d9367e7.pdf
    • https://kupejofep.weebly.com/uploads/1/3/4/5/134589233/fewawodepezevogum.pdf
    • https://cdn-cms.f-static.net/uploads/4403262/normal_6053e92b5a5b8.pdf
    • https://cdn-cms.f-static.net/uploads/4452385/normal_604b3c6256f5c.pdf
    • https://cdn-cms.f-static.net/uploads/4420037/normal_602641c8b3884.pdf
    • https://ridawijobufori.weebly.com/uploads/1/3/5/3/135318292/7259eb8db0b.pdf
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/6d07be442364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://poforezufovu.pbworks.com/w/file/fetch/144436545/last_cloudia_how_to_get_fairies.pdf
    • https://uploads.strikinglycdn.com/files/7fb813ae-8816-4387-b63e-bc02aa0bc7bc/harry_wong_classroom_management_quotes.pdf
    • http://nozobitativi.pbworks.com/w/file/fetch/144549642/zogeguzenewi.pdf
    • http://fufitan.pbworks.com/w/file/fetch/144554007/haworth_chair_adjustment_guide.pdf
    • https://uploads.strikinglycdn.com/files/e1b3b293-a2ac-4a94-bc5e-7376d73686cd/my_hero_academia_heroes_rising_english_dub_full_movie_facebook.pdf
    • http://numefen.pbworks.com/w/file/fetch/144539508/jiroxazawepofezaxu.pdf
    • http://bovojigu.pbworks.com/f/what_does_a_tight_piriformis_muscle_feel_like.pdf
    • http://pezeliv.pbworks.com/f/rna_transcription_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/96285083-e203-4053-ac86-ffd81ca0c09b/47003326115.pdf
    • http://sozakuvepar.pbworks.com/w/file/fetch/144506643/kimula.pdf
    • http://gamaxidad.pbworks.com/w/file/fetch/144536127/cara_pasang_mod_bus_simulator_indonesia_android.pdf
    • https://uploads.strikinglycdn.com/files/577a4be4-13d3-46db-8e9b-d1231e20ae8d/bally_continental_slot_machine_manual.pdf
    • https://uploads.strikinglycdn.com/files/3fa82be1-5f38-41fd-8ac2-c6297b07d66f/36044220508.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_off0000de27.bin
607b57e7af44249e8ab4e9c7a552037920cf6f81fe118837bfe759b680aa83fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5788 bytes
font_01_sfnt_off0000f1b7.bin
b44d2c67e2e382f9a2f421e93f83dfbd2966c0335afe3e51dc93385248329af0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 10544 bytes

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