Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee6f7410ebb5146…

MALICIOUS

PDF

169.4 KB Created: 2021-03-20 04:44:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42609ad444b3611558358afed3b44a7b SHA-1: dcb9c054345d092db842292a4d7c295e0ab7b03f SHA-256: 6ee6f7410ebb514648ccc6c18a77ef9ff35beaf79410db6acb3612e085a4e474
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, including one pointing to 'fokemale.ru', which is flagged as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a generated document designed to appear as a search result or a lure for a specific topic. The primary attack pattern involves directing users to a potentially malicious external site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/wix?keyword=warhammer+horus+rising+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6047f6642a5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_60135fe9a2284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_603749c80aba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_60183b386c694.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/8a1c9265-8e3e-4d12-a8e2-41cba9b6408c/shoprider_mobility_scooter_battery_life.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/fipufaselegojemem.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/how_to_answer_tell_me_about_yourself_quora.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/principles_of_interpretation_of_statutes.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_e91de318bba44577ba07007bc9d9b580.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_8b4466057fc64aff8836bd70a10689fd.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_14ac96e3dba5461dbcc63c96750345f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e806861-b4f8-461a-880d-1793f48f7726/que_es_distribucion_normal_en_estadistica.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_1633f6b053664081b5f7e50544ac0c14.pdf?index=trueIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_4499c8c17b70437a9d56200aef9dd836.pdf?index=trueIn PDF document text
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_93cb1be7899e4909ae58e49bc4db6165.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_dad113d273e04b328c375fc3a149f008.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5876762-6bcb-4856-80ce-e997282bd4be/sole_e35_elliptical_price_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e68edee7-f107-41e2-bfb8-ef093f6653da/bumogasetasodaduz.pdfIn PDF document text
    • https://1c3640e8-3530-4541-943d-4aa84fe9b526.filesusr.com/ugd/3e0cb9_e38baf302f864eea86a6493d21aa6b22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posufij/triangle_angle_bisector_theorem_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/rusazogelulonevuni.pdfIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_14ec9bba6f4a4a4da7bb2714ab42eeaf.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24764 5436 bytes
SHA-256: ca3bd8f158daa967a636ffadaa58b8d4bab6ab68cb1d7c1c3a0fa7bdc508a94a
font_01_sfnt_off000259c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259C9 12216 bytes
SHA-256: 24ced34ae694fb23b172e6da39ca89b3b3e013c66bbffc806721bae08650b2c2
font_02_sfnt_off000282f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282F1 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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