Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f73e8bf4f8b073…

MALICIOUS

PDF

69.7 KB Created: 2021-02-23 10:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 674a032677c80a959a8b49a988c82af4 SHA-1: 0a1ab9925e6d3f744643c6ceb3d7c5ce917d89a7 SHA-256: 98f73e8bf4f8b0736b90639816b70cda63aa98f976a4ec101e5f735f22b55090
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=mx+player+apk+free+download+for+android+old+version In PDF document text
    • http://kivedunorujuw.66ghz.com/la_iliada_analisis_literario.pdfIn PDF document text
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/8487176.pdfIn PDF document text
    • http://prizinsta365.website/what_are_the_rules_of_game_of_life7nqn1.pdfIn PDF document text
    • http://dirtygirl.fun/tipimolurexopazusariwpo.pdfIn PDF document text
    • http://fruitnaturs.space/581679078003x1de.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/go_math_grade_4_book_onlinehb6y8.pdfIn PDF document text
    • https://woxabofubal.weebly.com/uploads/1/3/0/7/130739449/zapanorovawisevo.pdfIn PDF document text
    • http://lodiped.iblogger.org/bonamat.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/oracle_12c_client_installation_on_windows_server_2016_step_by_step8pg08.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/1460437.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/razefovutedebeli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nijetazum.epizy.com/mercedes_e350_convertible_performance.pdfIn PDF document text
    • http://tijunejo.epizy.com/60345641363.pdfIn PDF document text
    • http://newurefaz.epizy.com/xunejurizatuxur.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_off0000cc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 5428 bytes
SHA-256: 38895928a1769ab10e903309a9d0840248bca9b40d6e0128088b713e607a5e70
font_01_sfnt_off0000def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF9 13452 bytes
SHA-256: ed4dbe64d15c352cd2d4161b13600ac6f5eaa527d0afc63e91f9c51a7ea7ede1