Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f8c219ad342649…

MALICIOUS

PDF

69.7 KB Created: 2021-03-31 06:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1402b1464ccc7b766553083fa8948c4 SHA-1: b18e23edae8ba0ba07f4b0490931c0c7cb6467df SHA-256: 98f8c219ad34264934608d3c04a7076a726d659b9de7a1a2cbd8ce710d5d5fb4
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-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://baarspo.ru/wix?keyword=serge+lang+linear+algebra+solutions+manual+pdf+free+download PDF link annotation
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/rinegodusuri.pdfIn PDF document text
    • http://koprovk.xyz/les_3_mousquetaires_film_2020dxuwa.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/xovinelalejovek.pdfIn PDF document text
    • http://yourdesk.website/80313836368f9q5b.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/3622449.pdfIn PDF document text
    • http://kilubome.iblogger.org/40986457699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_601dd99c6beac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_602983998b361.pdfIn PDF document text
    • https://wisomekusarukit.weebly.com/uploads/1/3/5/3/135384288/57a159b64736.pdfIn PDF document text
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/8741034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_603be0bf6f8ae.pdfIn PDF document text
    • http://fortuneo-enligne.com/red_dapple_dachshund_puppiesdof3g.pdfIn PDF document text
    • http://imkl-checker.com/94618391663l8it4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425229/normal_6057aa7ca0c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fdab46274896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485321/normal_603fe00ea47e0.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/66170ff5-a4ef-4830-9f91-f87e14f9f3ba/2008_lamborghini_gallardo_spyder_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967a2602-d2db-41f9-a599-33718b16177d/hp_elitedesk_800_g1_dm_graphics_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74537b85-973c-4fb1-a939-514c913d0f85/how_do_you_cook_cinnamon_rolls_in_a_waffle_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a604365-a12f-4722-a9cd-2ab83eda0ea8/98355621267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/883adcba-ea9b-4e48-a097-cc4ec85a6683/apple_iphone_5s_se_leather_case.pdfIn PDF document text
    • http://zekubegem.epizy.com/autodesk_autocad_civil_3d_2017.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_off0000d1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EB 5696 bytes
SHA-256: cfc31d101e0b067fc739b5c223f34adaa05ff39fdb3be9fd685f7045993f2174
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 10340 bytes
SHA-256: 1f5c2cbee6587a48e55ae9dab96d96d381ffeb41e51642a9e2fab69982044b47

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