Malicious PDF — malware analysis report

Static analysis result for SHA-256 6317f8e5d93b7c42…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 14:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 96a943e68b273eaffa5f97d016622196 SHA-1: f70268dd639735e946177cf2cda95974112c6737 SHA-256: 6317f8e5d93b7c42be584f79fa79543c615c2cfa06c5b2d07bb0e92080530c46
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://yafferge.ru/wix?keyword=download+piano+tiles+1+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5fc90ab2ecd89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_5fcc49df7ff06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_600a54dbde88f.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/zusuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5fde8fa96297f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxadib.epizy.com/bnz_account_application_form.pdfIn PDF document text
    • http://wesonujojamoga.epizy.com/darkshore_classic_guide.pdfIn PDF document text
    • http://rujidita.rf.gd/compass_learning_health_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/33136285339.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/barbados_auditor_general_report_2015.pdfIn PDF document text
    • http://govujetimavex.epizy.com/14110988038.pdfIn PDF document text
    • http://dovelarewiju.epizy.com/51562506933.pdfIn PDF document text
    • http://vojivetabepeda.epizy.com/72745143071.pdfIn PDF document text
    • http://kezaforow.epizy.com/kabifasafosapoji.pdfIn PDF document text
    • http://kariwukopufemu.rf.gd/total_coliform_bacteria_in_drinking_water.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB39 5064 bytes
SHA-256: f5b165e43e0ddd1c99356a20082fcc7f18ab1fa1b020871ccc2fcdc4f297f8c3
font_01_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 11056 bytes
SHA-256: 7b9eab3f414522a961afb339a96a583ce809cd7ef4a185cc907f66877817afc9
font_02_sfnt_off000101a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A1 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e