Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c7b6abd0a97835…

MALICIOUS

PDF

81.2 KB Created: 2021-04-02 23:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 61bcd7f0e3e93a0ab765ed26a6dfac8b SHA-1: c8fa2a6be09b6f44aecbd4e10ada578009e66a45 SHA-256: 07c7b6abd0a97835761933c38af9cb2b198e8a2b7e89e72a608b4719c6b5198b
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, and numerous other URLs, many of which are on disposable hosting or have unknown reputations. The document body, though heavily obfuscated, suggests a lure related to programming, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=assembler+language+programming+pdf PDF link annotation
    • http://pugajuxo.iblogger.org/upload_speed_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_601041777a830.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/0ia8Njf/satuvapupajepuzarunuk.pdfIn PDF document text
    • http://e-devletodeme.net/nasal_cavity_function_brainly0w8bw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_603bd25beb8b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_602ba31bcda8d.pdfIn PDF document text
    • http://weinmvc.net/how_to_check_transmission_fluid_level_ford_ranger1ludu.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/hjWjhLZ/sazodorifoxamekob.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/fascial_stretch_therapy26lgl.pdfIn PDF document text
    • http://newberginvestmentproperty.com/bushnell_trail_camera_owners_manualn3u2u.pdfIn PDF document text
    • http://save50it.pro/osha_approved_prescription_safety_glasses_at_walmartoh468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fed7353a46f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5fec863de9ba0.pdfIn PDF document text
    • http://febirag.iblogger.org/action_verbs_for_objectives.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/d19fb0b8-bf8c-4b4d-a1e3-9517f033475a/76273672716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7245fc-0407-436c-ab43-72f51e782258/ikea_malm_coffee_table_dimensions.pdfIn PDF document text
    • http://gevorewububew.epizy.com/merge_multiple_excel_sheets_into_one.pdfIn PDF document text
    • http://dutataratoboruj.rf.gd/61860916057.pdfIn PDF document text
    • http://zewebuguv.epizy.com/quantum_numbers_worksheet_honors_chemistry.pdfIn PDF document text
    • http://putijanonodeda.rf.gd/advanced_academic_writing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bde8fd1-5db5-44d8-b4a1-387363d16c03/71485676497.pdfIn PDF document text
    • http://renowuvix.epizy.com/calendario_dicembre_2018_da_stampare.pdfIn PDF document text
    • http://bikemeno.rf.gd/79662103768.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_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 5492 bytes
SHA-256: 67d97ad1e0578d55bb3e0f27a460f791436c185a5b83ac5cfaf28698d4e9332e
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 11916 bytes
SHA-256: 57d695781ab191a2fc9a1a32226dc3ea64505babba21c8e228b9084b8cb60b2d

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