Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77e493d5b4f6f85…

MALICIOUS

PDF

74.2 KB Created: 2021-02-10 02:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: b9c986e456feb23672cc4adb4939e759 SHA-1: 5ba9c64932cbef112277e09b6effca6c5cefe6b2 SHA-256: a77e493d5b4f6f85eed7f2f9f29758feee4ee5ef900b6a6d82b95dc1b852cc77
126 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
  • 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://druttle.ru/aws?utm_term=best+movie+tv+app+android PDF link annotation
    • http://salopkisa.website/pamerazojotenarewisabaoj03f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_600b582a8ea13.pdfIn PDF document text
    • http://fenellalucynelle.info/silicon_valley_community_foundation_scholarshipsjwl6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483870/normal_5fcac8b86fe9c.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/bluestacks_cn_60fps.pdfIn PDF document text
    • http://fortuneo-enligne.com/adamantine_definition_synonymsy6u82.pdfIn PDF document text
    • http://clobuss.ru/download_army_battle_simulator_mod_apk_unlimited_gemsvrdhi.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/kimabonevdx7j.pdfIn PDF document text
    • http://mmuuue.space/livro_ns_os_arcturianosbimci.pdfIn PDF document text
    • http://hookup756.fun/lost_grimoire_spellsf3zph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_600d493aa1737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebigibozudival.epizy.com/transformer_rectifier_cathodic_protection.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/7643391406.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/79438291108.pdfIn PDF document text
    • http://jomozaredid.rf.gd/64518870631.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_off0000e5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5180 bytes
SHA-256: afb95b4554cefaa33057deada427b25e1df44f27a6952b391140b97f6cc3ad73
font_01_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 10888 bytes
SHA-256: ebcdc7be5fe3eddfc4c1bce558c5dc2225d0bae727d3ec76d00df9c2dab4cb96