Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2a31135f1aab1e…

MALICIOUS

PDF

65.9 KB Created: 2020-12-21 17:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 724dbaa4d2857bc4268e963df140fdf1 SHA-1: d9512577fae7be046be663207b316c8eaf63b24b SHA-256: af2a31135f1aab1e956df42698a64b03b1a5e2ace9be551609fa3691ff90492a
196 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
  • 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.
  • 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://trafficel.ru/strik?utm_term=mallard+ducks+for+sale+houston+tx PDF link annotation
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/2646218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f872fb880912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5fdc741d92063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385198/normal_5fc603ddaf69b.pdfIn PDF document text
    • https://rotufufuzefido.weebly.com/uploads/1/3/4/9/134901673/gixozu_kifusozovebebe_doxesotela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f87a539389b8.pdfIn PDF document text
    • https://xavexedale.weebly.com/uploads/1/3/4/4/134475354/c65679a896.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2987871-1b50-489d-8a25-a43792c00e55/14136000248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a00c50f-225e-4dc8-9571-8bbb5536ee6c/pre_vizsla_helmet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d33d652-c203-4bf5-a8db-26a576483210/paxamonotusazeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1137b1-6f2a-4371-be7b-74989ec603af/tujazasitovivefomofipof.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/mario_flash_games_online.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_off0000c50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC50A 5248 bytes
SHA-256: a220f903e7ca16a048d14d47072d88f019ec9ee0e4ebb266cb4667aa0751a34f
font_01_sfnt_off0000d6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EC 10580 bytes
SHA-256: ff9b068bf72e3cf1a8cec7a093cc316008620bff4d21e5a76750fc33fd6d22fb