Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e493735420d9c5f…

MALICIOUS

PDF

93.6 KB Created: 2021-03-30 09:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d6c68fb5425a939aa29d88e8ee63e4e SHA-1: dce77adc49ebe7e6befa24ecfc26091e9a79fdbe SHA-256: 8e493735420d9c5ff8470e0683c882e7fdac7d8e9cf5a862dc809751b56d545f
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=fnsr+stock+earnings+report PDF link annotation
    • https://gixosakovi.weebly.com/uploads/1/3/4/6/134677645/reduzuk.pdfIn PDF document text
    • http://ujjjrrrrr.space/upkar_gk_book_downloadgembz.pdfIn PDF document text
    • https://logudapixifoke.weebly.com/uploads/1/3/4/3/134371583/lofevukobufuvi-ravedonumix-geridibakizij-buxujo.pdfIn PDF document text
    • http://flathead.us/fulomugxydpi.pdfIn PDF document text
    • https://niwezeruzebunol.weebly.com/uploads/1/3/5/3/135387699/34f7523.pdfIn PDF document text
    • http://djami.ru/operating_instructions_for_power_pressure_cooker_xl6dchd.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvuzebilet/tjjRO1x/minerals_in_food_video.pdfIn PDF document text
    • https://cdn.sqhk.co/nibubovixif/aLJdEBd/43455532138.pdfIn PDF document text
    • http://alisaborodaenko.design/football_manager_2015_download_maca4n8o.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/nNNhbcz/russian_car_simulator_2020_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zobazulibes/higifgf/zesug.pdfIn PDF document text
    • http://metryck.info/garenixogebojek3929.pdfIn PDF document text
    • https://cdn.sqhk.co/jovojatubo/jshavpO/upholstered_daybed_office.pdfIn PDF document text
    • https://cdn.sqhk.co/foletesubuf/lF75pbu/28235650150.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/UiheTgd/fowinizaxefakoj.pdfIn PDF document text
    • http://foodguideblog.com/kepesoxorakuvaxetkvqmq.pdfIn PDF document text
    • https://mukoxawav.weebly.com/uploads/1/3/4/6/134627731/6036299.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/gjfTIgi/nemosidedilatixotogedan.pdfIn PDF document text
    • https://kagozekexep.weebly.com/uploads/1/3/5/9/135956698/464f564.pdfIn PDF document text
    • http://biomanua.website/pizewowomelilipifiwoweku9dvn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4253c66a-660d-4c83-b31d-f715833d547b.filesusr.com/ugd/d9e9a0_911cae7b6b3546489de0bbde8262e40b.pdf?index=trueIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_321492bcc0c24b89824ba2b75008b48d.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_d90b6d35dedb4e46a9c42e5a67e401d6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F88 5088 bytes
SHA-256: 41f4ff903947fb905e35d566cb9d955b08c33de289f6a0df497bce01073d6b14
font_01_sfnt_off000140f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F6 11928 bytes
SHA-256: d080eaa20124f727fc9c1984c20f454c5b9fb52cd7416ff406ed1672a93f8a85

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