Malicious PDF — malware analysis report

Static analysis result for SHA-256 6254e68c8c0d2595…

MALICIOUS

PDF

78.6 KB Created: 2021-02-19 16:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c62ddfb121d7aae502bce416029db1aa SHA-1: 77f6f9648bd609d44d3bb3414fa61a84310f8ebd SHA-256: 6254e68c8c0d25956ceacb0cdeee9ed0e142ce6698c24da79ddb66cac1c7dae7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable domains and configured as a link farm, strongly suggests a phishing or malware distribution campaign. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary threat appears to be the redirection to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/wix?keyword=karin+bleach+voice+actor PDF link annotation
    • http://ig-verifiedsbadge.com/988606312997l0yy.pdfIn PDF document text
    • http://idealslimitaly-official.site/81892622297ca359.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401517/normal_5fe1ee5113125.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/vigojifelarupix-kerosirowafup.pdfIn PDF document text
    • https://xemivonosinuvi.weebly.com/uploads/1/3/5/3/135314407/1130622.pdfIn PDF document text
    • http://requiremcgood.com/rocketbook_review_ukr6wcv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_6003f86230e1b.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/dosafaxeximisuz.pdfIn PDF document text
    • http://klossheff.xyz/6810196177897q14.pdfIn PDF document text
    • https://wofovado.weebly.com/uploads/1/3/1/8/131871653/402649.pdfIn PDF document text
    • http://golosa-spasibo.ru/457690794476ylrs.pdfIn PDF document text
    • http://hdvideo.design/business_report_sample_rmitmby89.pdfIn PDF document text
    • http://bestsalestoday.xyz/how_to_change_power_board_on_vizio_tvwvlnf.pdfIn PDF document text
    • http://hytri.com/75668998012pnxub.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/leteraxewe/antisocial_behaviour_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/dofirowijigifupabug.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/musukamepo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/facebook_like_software.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7B 4876 bytes
SHA-256: 3537c65263c52e16f1e272421338df5f8fdec296fee6207627cb32d829d1c06b
font_01_sfnt_off0000fb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 3612 bytes
SHA-256: 9ec2334109a64ab6083a0f464bd526e5c40fd95763d27cfe16fab05d5a3541ab
font_02_sfnt_off00010994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 10436 bytes
SHA-256: 960efdccdd791f40847b42a969b205453546a4de100f0400a7d77b0d2697b947

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