Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f16dc706fc5d89f…

MALICIOUS

PDF

66.1 KB Created: 2021-02-21 16:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8450f538ffea19cf2c36f6f5f7b66fbb SHA-1: 58ca7d929765cfb0e396adf678806fb5a98157b5 SHA-256: 6f16dc706fc5d89fca25e8d37adf7e0165bd4760616d7644b7b279e7a933c915
184 Risk Score

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://crophysi.ru/123?utm_term=a+lesson+before+dying+chapter+18+quizlet In PDF document text
    • http://mavpa.fun/kowudolylqeg.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/jjeoAhd/magic_castle_hotel_popsicle_hotline.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417426/normal_6007a00db3502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_602b61b93e4d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421342/normal_5feea488b2c8d.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/aEjgrGi/private_downloader_apk_3._0._1667.pdfIn PDF document text
    • http://itgermany.net/destruction_warlock_guide_wowheadyc51w.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jjdiahi/27933658105.pdfIn PDF document text
    • http://9gusevshop.website/7800655638968e8u.pdfIn PDF document text
    • http://jusapp.club/is_olympus_good_camera_brandfxbpt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodobokojezaga.epizy.com/la_times_sunday_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/cleric_guide_5e_forge.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/b._sc_agriculture_online_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/naxawafanekominij.pdfIn PDF document text
    • http://digimoxesimukus.rf.gd/venimirasurunegoza.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_off0000c5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B3 6072 bytes
SHA-256: 49a19d0b8973a998f64aac4d4f349c9130d8e01e42fce66044724f5180408030
font_01_sfnt_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 9720 bytes
SHA-256: 8367bd3a767b43611ebd6ba1a4e4f0181500d9929e532916c6ad39766bde5f8b