Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c73ece5322e2993…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 06:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1b9d76e489331965e85ff5696cba93bd SHA-1: 2186e73adba2fc82c0a777b1107912e06ae6d239 SHA-256: 0c73ece5322e2993ed599551518dfa4a110a749c0780c2489f4a4f4222008ce9
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan. It contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains keywords related to 'berean study bible pdf' and 'wkhtmltopdf', likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/award?keyword=berean+study+bible+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418171/normal_603155e11b918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_6055221e0cd02.pdfIn PDF document text
    • http://jofefipibabalul.22web.org/filar.pdfIn PDF document text
    • http://probkin34.xyz/thirteen_reasons_why_cast_datingogc9r.pdfIn PDF document text
    • http://chambrehq.xyz/46597723542mhua1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_602570049bedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6041fa885f078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbdca41-2390-4450-8fc0-30df3de15aff/lugojuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b029a9-d66f-4d6c-b253-515a7f181fb3/68940274014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82e7f869-006b-4108-b87c-9049f630fc39/husqvarna_blower_125b_parts_manual.pdfIn PDF document text
    • http://kipurifer.epizy.com/business_process_reengineering_free_download.pdfIn PDF document text
    • http://repafow.epizy.com/cello_solo_christmas_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9849e9f-1a4d-4cea-bda0-24d3bb09f890/dark_souls_2_save_editor_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/25954897426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150d976e-dc70-43b2-b4f5-edc32e32b4c4/how_to_set_tax_on_casio_hr-100tm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242c2bef-a17c-4bcb-819e-446ec3548b15/bobcat_ransomes_36_walk_behind_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/catholic_prayer_booklet.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/autocad_tutorial_2021.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/32123317332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c3a779b-cbab-4516-95b4-59c5690bb73f/focusrite_scarlett_2i2_older_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/nes_emulator_roms_apk.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_off0000f57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 5324 bytes
SHA-256: d4754f1399daba6e42e9208349e9f0fe225422ebc5b46941f9fbbdff047e5e10
font_01_sfnt_off000107a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 11208 bytes
SHA-256: 85dcbb0d979b2742275bbd8a2d62e5c7eca1b35ee60b2a06dee0b64af64a66e4

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