Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8f36f41d3f5f008…

MALICIOUS

PDF

71.2 KB Created: 2021-02-27 09:12:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b4398e7f402a485cf3f1f8e8a6b74bbc SHA-1: 818aa9c3084610e20e43e8cac0f425b30386b349 SHA-256: c8f36f41d3f5f00898f72db3e93f05d8569ead9d0e7c8e2d6b4d14fe23522745
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://ponafet.ru/award?keyword=kenmore+elite+oasis+washer+drain+filter PDF link annotation
    • https://tosixugiza.weebly.com/uploads/1/3/6/0/136052785/3623991.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/excel_template_for_business_income_and_expenses.pdfIn PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/felasan-mavodoziwokuteg-wadalewozip.pdfIn PDF document text
    • http://naxiramomamaz.66ghz.com/reflejos_arcaicos_pediatria_2000_tomo_1.pdfIn PDF document text
    • https://jesebumu.weebly.com/uploads/1/3/4/6/134617302/pegewutuxarona-dogofare-lefafal.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/ihIhchc/pakozepel.pdfIn PDF document text
    • https://cdn.sqhk.co/juwafajem/oRXtggy/zokexewilivonowareruj.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/meladuxalusili_mobeluxa_welurowisiv_nesepomadarupe.pdfIn PDF document text
    • https://zifofuxe.weebly.com/uploads/1/3/5/3/135386801/folifujozakenovedaz.pdfIn PDF document text
    • https://depuxozepol.weebly.com/uploads/1/3/4/3/134377374/kasasupika.pdfIn PDF document text
    • https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/dejokifa.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/346bdb58cc45.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/7710095.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/novekobupimus.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hcgi9Vp/liferipuwez.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/nawosineromigi/bcbs_mn_contact_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/bitter_moon_subtitles_english.pdfIn PDF document text
    • http://girogabunuxumu.rf.gd/apex_jumpmaster_guide.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_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 5208 bytes
SHA-256: 79ae3acf966ed5e90d6d7bd1e052e3715cf79a87b6f74ff4062fd168db982b1b
font_01_sfnt_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 10344 bytes
SHA-256: 0703e61980eccc6cabc060781fc44576b1bd6938145de4dca2ca0be4aa593dbd

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