Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc887f7bc70b943c…

MALICIOUS

PDF

81.2 KB Created: 2021-03-05 02:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9719f2091236176a4badc6cf1042e700 SHA-1: cdfb20fceb23658df3cf96f6f2ac20e5d481a9d0 SHA-256: bc887f7bc70b943c8989b4c53b2f20d967c94d15e34f234c1b3c4790983e1f2f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=girl+with+the+dragon+tattoo+trilogy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366405/normal_603ed86fd5881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_604161cc84269.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/learn_how_to_trade_binary_options_for_beginners.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/english_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467589/normal_602e1d8d5e500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_60336077856ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_60416347e7cf9.pdfIn PDF document text
    • http://logemopi.22web.org/lake_loramie_fishing_report_2018.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/over_the_rainbow_sheet_music_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5ff907ca6aa8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fde449007f75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_600ccac7ed536.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/remuv/vanewabotunaziketazus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6c6ad3-6f96-43ed-8bc6-27570a720175/heat_and_mass_transfer_cengel.pdfIn PDF document text
    • http://gilikasozomexo.epizy.com/animal_farm_flag_symbolism.pdfIn PDF document text
    • http://pirajog.epizy.com/c_interview_questions_for_10_years_experience.pdfIn PDF document text
    • http://pimorem.epizy.com/difference_between_hygiene_and_sanitation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c8c6d6-9998-471a-ba0e-9a1d97f3a7dd/nadixabotopekaxexegud.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/how_to_lose_weight_without_exercise_and_dieting_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/6476730826.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/situational_interview_questions_and_answers_for_executive_assistants.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 4924 bytes
SHA-256: 7ce6d9b5bece6da14f5dbe577a67ba5d340b5acbb2be0f5167927eb875b3c18b
font_01_sfnt_off000100e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 12156 bytes
SHA-256: 96023e0b4a3078e717cd82a2a7f39e08bb298ec84da0db6b3a8c752d8139e600
font_02_sfnt_off00012958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12958 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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