Malicious PDF — malware analysis report

Static analysis result for SHA-256 002750b20310544a…

MALICIOUS

PDF

85.2 KB Created: 2021-02-23 16:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 7b61251b7e6d67c25b563caa09b0729d SHA-1: 6ccc49dba176f596f1af485eb248b1052505ba5f SHA-256: 002750b20310544adab888de00cd5436cf8ccce2ef7c55d89a1922b4279bf134
184 Risk Score

Malware Insights

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

The PDF contains multiple links, with at least one pointing to a known malicious redirector (https://yafferge.ru/wix?keyword=c%2527est+pas+bien+music). The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm on disposable hosting, further supporting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=c%2527est+pas+bien+music In PDF document text
    • https://cdn.sqhk.co/jawutuwek/idijjhz/viridiana_alatriste_funeral.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fcdfab226464.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/xibihRi/toverutosano.pdfIn PDF document text
    • https://cdn.sqhk.co/vezukefuza/ETgfiai/masterpiece_barber_shop_cheyenne_mlk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_600f9d96cf04a.pdfIn PDF document text
    • http://dipitazifageb.iblogger.org/roked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_6030292f70f1b.pdfIn PDF document text
    • http://arenaprobet.com/arundhati_movie_scenes_in_tamil8wl77.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/ggbjijc/real_space_image_download_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/1bhdshi/cyberpunk_2077_stadia_pre_order.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/10gdBAS/this_is_the_police_walkthrough_investigations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kujujigufa.epizy.com/mizesowerujifofafunewafod.pdfIn PDF document text
    • http://konevimojo.epizy.com/free_worksheets_community_helpers.pdfIn PDF document text
    • http://bewaxupu.rf.gd/mayne_pharma_annual_report_2015.pdfIn PDF document text
    • http://najepesirezamuz.rf.gd/66640426465.pdfIn PDF document text
    • http://timojakizufijad.rf.gd/pipufoxikewawaz.pdfIn PDF document text
    • http://lemutuzuvaw.rf.gd/ias_topper_2019_answer_sheet.pdfIn PDF document text
    • http://gewapapis.epizy.com/autodesk_revit_2015_family_library.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/free_latest_version_of_fm_whatsapp.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_off00010dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC6 5032 bytes
SHA-256: 04802cbbc25af228d568489c6d699e5927a91d34746568217242f0614f9f5438
font_01_sfnt_off00011ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED4 12456 bytes
SHA-256: b44d5d2c98a204922fd5401c2efba3e06be08bc8ff2bdb954fdcc7e780b657ca

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