Malicious PDF — malware analysis report

Static analysis result for SHA-256 66aaf76f68d0ccdc…

MALICIOUS

PDF

74.0 KB Created: 2021-02-15 17:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 29e60c085d31a0f2fa5b5838cbda9479 SHA-1: 4df00233e239c86e5d7e040a1edc1c9ed7a94858 SHA-256: 66aaf76f68d0ccdcfd8c351c0068709e47d7c45918b5fa2f62bf667a20245c41
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/aws?utm_term=nitro+pdf+reader+free+download+for+windows+7+64+bit In PDF document text
    • https://cdn.sqhk.co/jeporikate/jiw3ijz/79509149471.pdfIn PDF document text
    • http://all-host.site/apprendre_anglais_facilement77fen.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/KzWdTib/bafaborisadigikufu.pdfIn PDF document text
    • https://babibogek.weebly.com/uploads/1/3/1/3/131379554/2726830.pdfIn PDF document text
    • https://ranutejojem.weebly.com/uploads/1/3/5/3/135314135/naranewajaxazu_noxuxamupusuve_wegagimojofafor_berekaxesiteg.pdfIn PDF document text
    • http://thefortykuti.com/9735377315007bkw.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/vexifotafepetidavili.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/Mjaiagg/84810706536.pdfIn PDF document text
    • https://jotutavujisab.weebly.com/uploads/1/3/1/1/131164129/2bb1130.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/ghsZSia/64820370795.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/gg7ggic/wenozunef.pdfIn PDF document text
    • https://cdn.sqhk.co/losiluja/hfgjjFg/switch_pro_controller_pc_dolphin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilagerezob.epizy.com/coffee_day_global_limited_annual_report_2018.pdfIn PDF document text
    • http://votemajaw.epizy.com/ketiro.pdfIn PDF document text
    • http://dudenakapevawos.rf.gd/87206410504.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_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 5560 bytes
SHA-256: c5ea84410874c99b0c37b18697ad989b9fd94fc2d72adcacd6d32999c0a07176
font_01_sfnt_off0000f695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF695 10640 bytes
SHA-256: 069d240fa18cc683f67551d32d1a0ff8501b37368b16928eee202466eb21f6e1

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