Malicious PDF — malware analysis report

Static analysis result for SHA-256 d646ac5a36853280…

MALICIOUS

PDF

80.5 KB Created: 2021-03-14 07:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 69f829368822a66aa1d6df906d537aa6 SHA-1: 1e6220374942cae1ba512de83e23d44f0bcc7933 SHA-256: d646ac5a36853280694a7fe51a5e4e6bdb3c02140a911067d36a88e5e54b008d
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and exhibits characteristics of a payment redirection lure, suggesting a phishing or credential harvesting attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands, possibly via embedded scripts or links, which is a common technique for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://zajinet.ru/wix?keyword=the+traders+guide PDF link annotation
    • http://zuvatewovu.scienceontheweb.net/dimomujixefobivefosi.pdfIn PDF document text
    • http://tublitalia.space/mibuwobobamokuwl26t.pdfIn PDF document text
    • http://cyberlife.store/54711909167mcsmg.pdfIn PDF document text
    • http://dresdenpharma.ru/wegutuzivasoh1rvx.pdfIn PDF document text
    • https://runufegoxow.weebly.com/uploads/1/3/5/3/135347372/63aac143e6e5.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/windows_powershell_startupprofiledata-noninteractive.pdfIn PDF document text
    • http://portkamesto.site/what_kind_of_oil_does_a_2016_honda_odyssey_takepf8ny.pdfIn PDF document text
    • http://1ux.site/how_to_use_stiebel_eltron_heater1anm9.pdfIn macro / runtime command snippet
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/7899711.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/wudevirafiwukoteki.pdfIn PDF document text
    • http://in-step.shop/how_to_write_a_staff_memor3lcl.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/gezililik.pdfIn PDF document text
    • https://geguwuwivoloko.weebly.com/uploads/1/3/1/6/131636947/cf917.pdfIn PDF document text
    • http://autoupgrade.website/23920861370q75rk.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/administracion_de_recursos_humanos_9_edicion.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/nixufibam.pdfIn PDF document text
    • http://scm03.ru/gijugg34k4.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/49d24739-2254-4c88-a169-87ed2da432e3/who_sold_more_records_than_the_beatles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bedd63-1906-4b76-bbb4-298399bc89a0/easy_duplicate_finder_key_generator.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/favovetonobanetofowisuxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b81168-53b7-4f30-8f8e-8713746913c7/79896512334.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_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 5004 bytes
SHA-256: 68d3e22e96ddae971eaa6299787acef3ebe4873f4728b4358d35702215421eb2
font_01_sfnt_off00010e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1C 11320 bytes
SHA-256: 35c1a472f69bb8dff9b0f3c6278d4df530f4b22be45cd8576f9c85c9d1ab8099