Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3983db1e938188…

MALICIOUS

PDF

69.0 KB Created: 2021-02-06 09:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cff40c72fc480d2ab4bf1175009df888 SHA-1: d244903b2f2d6c8fe7c67be3a8ae86da7bcc1cf5 SHA-256: 0a3983db1e938188a2c7492168a9aef0dccfcfd90fc0b1985adbd635f7ee2892
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://baarspo.ru/wb?keyword=encephalopathy%20hepatic%20pdf PDF link annotation
    • https://cdn.sqhk.co/goxobuve/hi5Pghf/51120503076.pdfIn PDF document text
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/2573690.pdfIn PDF document text
    • http://pevetune.66ghz.com/cbse_class_5_maths_decimals_worksheets.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/tarizabe.pdfIn PDF document text
    • https://luxakanodaz.weebly.com/uploads/1/3/4/5/134589800/jutukiguge-dusubako-pizixi.pdfIn PDF document text
    • https://cdn.sqhk.co/wumidimux/AWghjao/24645016638.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/bjaTMia/youtube_tv_apple_tv_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/ogh3wlf/splendor_board_game_rules_nobles.pdfIn PDF document text
    • https://cdn.sqhk.co/nesuxozajek/jaWijje/xemixawizopovukevotifavet.pdfIn PDF document text
    • https://cdn.sqhk.co/gobamagedesi/dgcEjjF/76591374829.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/ijfgWjc/41518165586.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/vuterijoze/33049181761.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/33768432555.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/soya_bean_production_guidelines.pdfIn PDF document text
    • http://jikebejilogotum.rf.gd/taiwan_visa_application_form_for_philippines.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_off0000d3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EB 5028 bytes
SHA-256: 4096dee7a855075a0c51d94cf5e3cefc0c6fc5f20e671b26efca3498576ae940
font_01_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 10104 bytes
SHA-256: e172f654d91c4f63d249adbddd7b420b17ffe6d59ac99c658992e31520a44439