Malicious PDF — malware analysis report

Static analysis result for SHA-256 376d3e7d112aa5f8…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 21:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f90b1ccde986f0aa1b54313ce7dd2ab2 SHA-1: 0ce7ed9ffd471d2a2df6b962b644f26b35f3b54a SHA-256: 376d3e7d112aa5f8b21719a297d579c36c595e2b7550c0b65c83f07297192f15
126 Risk Score

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 0.9990

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=watch+black+butler+season+3 PDF link annotation
    • http://bet-info.ru/5094242851905l45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6052e8bce97db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_60192f4664eb5.pdfIn PDF document text
    • http://choosenews.space/gumuxaxugagexakixasenekeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475219/normal_5fe463e7d554a.pdfIn PDF document text
    • http://fc-aromat.ru/dutazuzaxilelofurkjsxq.pdfIn PDF document text
    • http://zasopawemumobaw.iblogger.org/repair_car_air_conditioning.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/f9Nicgi/hello_neighbor_2_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_604da826568ba.pdfIn PDF document text
    • http://magnetfix.store/how_to_put_a_vinyl_decal_on_your_car_windownfn61.pdfIn PDF document text
    • http://jakartapro.xyz/what_temp_should_water_heater_be_set_at6v84t.pdfIn PDF document text
    • http://fosasovizi.22web.org/64220715146.pdfIn PDF document text
    • http://beliyden.xyz/pekejotagokawufirgju1k.pdfIn PDF document text
    • https://cdn.sqhk.co/pemiduwegam/bosjdzb/water_slide_extreme_jump_house_rentals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_6037f3d196198.pdfIn PDF document text
    • http://copyright-notice-ig.com/18997093071vh1ce.pdfIn PDF document text
    • https://cdn.sqhk.co/waladoved/VOjiNhg/marketplace_foods_rice_lake_wi_ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_13d84cc6b98c43b8ad8f0f90e3281921.pdf?index=trueIn PDF document text
    • http://bixoravu.epizy.com/jenetovagoke.pdfIn PDF document text
    • http://getakufo.epizy.com/juniper_switches_configuration_guide.pdfIn PDF document text
    • https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_2e960b8d775d41fc9c795c066038fc30.pdf?index=trueIn PDF document text
    • http://terefikug.epizy.com/7174321196.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_113372a5d4ce4e7ab604daf2403fb207.pdf?index=trueIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_ceb9437944c34814ac42defc0b965fc7.pdf?index=trueIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_5def8fe4839e4ce394b2ad5978427012.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_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 5268 bytes
SHA-256: 25ac08d0c2e81cb7523063cd29f2031a00abbf8be77cc41d6fcbfa093e33e972
font_01_sfnt_off0001038b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038B 10784 bytes
SHA-256: 4a785c570bf4bb90d500379a1ccdc2591cb339810be6f8a75b6d8f9eb06a5dcd