Malicious PDF — malware analysis report

Static analysis result for SHA-256 c74983534808b462…

MALICIOUS

PDF

72.2 KB Created: 2021-03-13 22:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a34e29af59dafaca01098ad880331368 SHA-1: 09a6ccc509effbd6030062cb0457d5622b4afc6e SHA-256: c74983534808b462128f201f5860e36d85f655d6f0199bd4363cb77fb916c232
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, a common tactic in tech support scams or financial fraud. While no scripts were extracted, the PDF structure and embedded URI suggest it likely exploits a vulnerability to deliver a malicious payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jumiwimov.ru/123?utm_term=cullinan+holdings+annual+report PDF link annotation
    • http://zokugorevat.mywebcommunity.org/55926761001.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/gDhhbGX/79003203221.pdfIn PDF document text
    • https://cdn.sqhk.co/fujesepulo/rhdhcif/blood_pressure_machine_omron_m3.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/python_for_everyone_2nd_edition_free_download.pdfIn PDF document text
    • http://zijaditenup.getenjoyment.net/advantages_and_disadvantages_essay_topics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jezobasit/leed_core_concepts_guide_version_3.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/likunodubufipolopo.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/new_year_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/formal_letter_request_for_permission_to_visit.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/migare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9eed6f2-468b-4bb4-93a1-c8aba5673890/72705864599.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/microsoft_windows_7_iso_direct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3804f466-de08-4920-9efd-60a0192b34a4/what_type_of_oil_for_a_toro_snowblower.pdfIn PDF document text
    • http://jemileti.atwebpages.com/how_many_words_should_a_2_year_old_talk.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/housefull_4_new_song_pagalworld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b3bb38-f36a-474a-a6e4-2032805ff114/wuxetowigij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e10c42-f7ca-4e78-9cbd-38c43337bdfa/o_come_to_the_altar_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/public_access_to_case_information_az.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/ds3_curse_rotted_greatwood_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/vukutagaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/alton_towers_map_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/braun_thermoscan_7_irt_6520_best_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/xbox_one_controller_headphone_jack_not_working_fix.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/bosch_washing_machine_series_4_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC25 5124 bytes
SHA-256: f067e59ddca4466db64237e00ddd108af369d698e0df5c4e142a691ae92d3151
font_01_sfnt_off0000ed85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED85 10976 bytes
SHA-256: dcbc063a693887301af96512fcf88673f0d674ec350bf15a2274e520e931d85e

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