Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33c90ec23ec696b…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 09:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6c96738051c82ca5a2b90ba806b7ab5f SHA-1: 10fb7703d6d37e423a901e5161bf67786d9cf532 SHA-256: e33c90ec23ec696be1e5ac7e8761aef8a993328c233328fc91586e9d0643c073
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=a+long+walk+to+forever+ending In PDF document text
    • https://cdn.sqhk.co/mipekakiri/OiijjPC/snow_drift_quartz.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/58vDTiD/traffic_racer_mod_apk_happymod.pdfIn PDF document text
    • https://bopovajo.weebly.com/uploads/1/3/5/9/135966354/3694094.pdfIn PDF document text
    • https://cdn.sqhk.co/bujedebi/f9qhh9s/613545489.pdfIn PDF document text
    • https://nolemidu.weebly.com/uploads/1/3/4/5/134584078/7547873.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/segasugur.pdfIn PDF document text
    • https://pudeputuxokaj.weebly.com/uploads/1/3/5/9/135968230/vukibis-xaletusesexike.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/7b6f50b6e8.pdfIn PDF document text
    • https://gebezemimubitup.weebly.com/uploads/1/3/1/0/131070169/472db17138352b4.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/gemCmfS/lobekunovubajukorilalak.pdfIn PDF document text
    • https://sitofozaliwi.weebly.com/uploads/1/3/4/3/134355749/e50da2.pdfIn PDF document text
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/voxapipal.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/cibPIxo/infection_control_certification_ny_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/napebopujop.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/38130820835.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_off0000e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58F 5100 bytes
SHA-256: 67826368a76f42207f496ba2d325bf4e5d598e360eaa57109921a4620b209901
font_01_sfnt_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 10040 bytes
SHA-256: b6b3f2911a83a05653b2f01755cd822058309ff74430ef2e3650b4078ee7b7ae

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