Malicious PDF — malware analysis report

Static analysis result for SHA-256 af25b0dbe2e270bc…

MALICIOUS

PDF

79.0 KB Created: 2021-02-19 20:44:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: c5196ab0b02206785d362ef34119eb9e SHA-1: cd0cad1b5c5ecbb06deb39d2cbc1044bbe20e4d6 SHA-256: af25b0dbe2e270bccf38a06fe40256e47c321d470a1a7a27ca1f6e65c02aa58b
254 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=what+are+the+three+types+of+metabolism In PDF document text
    • https://liwetevafiwa.weebly.com/uploads/1/3/4/0/134096648/tatatup.pdfIn PDF document text
    • https://xoputiwi.weebly.com/uploads/1/3/1/4/131438532/gotazizikedotenubada.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/fodezopebo.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/6370486.pdfIn PDF document text
    • http://nowuxik.iblogger.org/zuduvebosado.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/latufenaw/vefem.pdfIn PDF document text
    • http://dubabin.rf.gd/camera_scanner_to_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/chhello_divas_movie_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/zawifegabix.pdfIn PDF document text
    • http://ramimivojis.rf.gd/32139997755.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/87807800529.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/10331350785.pdfIn PDF document text
    • http://kotutuvotijol.rf.gd/tajanukipen.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/93910129028.pdfIn PDF document text
    • http://lajusakulibu.rf.gd/all_american_25x_electric_autoclave_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/62559086573.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/uniforme_colegio_champagnat_popayan.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/derafajajibim.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_off0000f850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 5396 bytes
SHA-256: 9d5096ef1b096cf91d5079ab8c843d92b6ede8582ddfa96a2cff263313b85b50
font_01_sfnt_off00010a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8F 10524 bytes
SHA-256: 6563b4c80e24e3484a2b4287d1f02bc716c33e6fc8747378c3eecfd01debedbe