Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb733aa640217ea3…

MALICIOUS

PDF

73.6 KB Created: 2021-06-04 13:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a67e42fb5216d2e06aacc599a4da565b SHA-1: 79e25ba8faba9a4267ec9bc8fffdae2ec43d79d3 SHA-256: fb733aa640217ea30d42a346d8b210bf098a7f2126c9891734c0b3a7652f5fa8
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a URL that is designed to look like a legitimate Apple ID password reset page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing. No scripts were extracted, but the presence of the external URI is a high-confidence indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://inwebjor.ru/pbw?utm_term=how+to+reset+apple+id+password+through+email
    • https://cdn-cms.f-static.net/uploads/4374519/normal_6059c18631772.pdf
    • https://static.s123-cdn-static.com/uploads/4451045/normal_5fc7e02e39de0.pdf
    • https://static.s123-cdn-static.com/uploads/4427085/normal_60096a48d8389.pdf
    • https://cdn-cms.f-static.net/uploads/4499629/normal_600a62ae9b97e.pdf
    • https://cdn-cms.f-static.net/uploads/4389376/normal_60b8a0e282554.pdf
    • https://cdn-cms.f-static.net/uploads/4486206/normal_60513c467fce6.pdf
    • https://cdn-cms.f-static.net/uploads/4387571/normal_5fdc0311c51e4.pdf
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fe7a3d7419b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b3a884e2-d5fa-45d9-bc1e-b0b85c94fede/how_to_watch_harry_potter_free_on_roku.pdf
    • http://zufiwuz.pbworks.com/w/file/fetch/144600795/ponagizuk.pdf
    • https://uploads.strikinglycdn.com/files/88c8e684-cead-41d4-a23f-e3106c37e17d/fluval_fx6_turtle_setup.pdf
    • https://uploads.strikinglycdn.com/files/30d79ba8-0370-4ad8-9179-613098842325/gemumopot.pdf
    • https://uploads.strikinglycdn.com/files/23f47b28-0184-4721-bb04-a61431b0066d/do_target_starbucks_employees_get_benefits.pdf
    • http://rupebaxo.pbworks.com/f/demarif.pdf
    • https://uploads.strikinglycdn.com/files/c134cf38-0466-4472-88e0-52c5f74f96fe/binding_of_isaac_four_souls_rules_faq.pdf
    • http://zizovitunex.pbworks.com/w/file/fetch/144483327/libro_de_lecturas_tercer_grado_1993_para_descargar.pdf
    • http://nilanom.pbworks.com/w/file/fetch/144420117/100_pics_answers_drink_logos.pdf
    • https://uploads.strikinglycdn.com/files/33166dc2-9211-400f-abbd-46ddbd2d0242/60362461290.pdf
    • http://jozeluwofe.pbworks.com/f/what_is_there_will_come_soft_rains_poem_about.pdf
    • https://uploads.strikinglycdn.com/files/9f19cbb5-edcf-4428-8952-0b393946d9df/learn_arabic_language_free.pdf
    • https://uploads.strikinglycdn.com/files/720aafc7-a35b-4ebc-be9b-e4b321203237/tone_it_up_journal.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_off0000e118.bin
f323ce1b201ad1bd622310e90cb032eb78c3274dccbb99fde338daeb43fd821a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 5428 bytes
font_01_sfnt_off0000f36e.bin
85870e6789bb2883b160ae830a2e4166586261ad54502f392d18b449c003fd21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 10848 bytes

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