Malicious PDF — malware analysis report

Static analysis result for SHA-256 4456f2f04c5fe49d…

MALICIOUS

PDF

70.2 KB Created: 2021-12-13 15:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: a8ca51d3e776f8e592a30f2ee92a26d7 SHA-1: ecfce0677a5b27ff38568440a8ab48cc66005f08 SHA-256: 4456f2f04c5fe49db614dcbde247d68247f4d9afc7f7b36edd1386b9d829b892
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the overall structure and URL analysis strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://baloneacessorios.com/_upload/file///82401207398.pdf In PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/51392249411.pdfIn PDF document text
    • http://ipllaser.in/uploads/fevuvif.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/pidorob.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/muneloxeborelabudewisosug.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/68530312137.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137316002981---faxag.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/jexojane.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/fajejemezovoxeti.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/79510478198.pdfIn PDF document text
    • http://dges.in/userfiles/file/81451673822.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/59982323613.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/229cuviedm7seeu70q43ad1ed2/voxesusixosiluzura.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/16579887581.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/milorulit.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/89040926547.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/paminunonawok.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/50447961303.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/85826950679.pdfIn PDF document text
    • https://medtek.vn/storage/file/47357138707.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161953df1acbc7---2931523647.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/32064280400.pdfIn PDF document text
    • http://jiuhuapm.com/upfile/file/nuzokaxemizaribofepinix.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/53118817941.pdfIn PDF document text
    • http://aimer.netdbhosting.com/file/manuvugedojomuloke.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/BGAemAmcdTc/uplcv?utm_term=how+to+reset+casio+watch+datePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09A 16944 bytes
SHA-256: b4563c39416315a81d687bc685afb426dc61016b7b53da655b63d853e7b954cf
font_01_sfnt_off0000dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBC 10396 bytes
SHA-256: 04e5c757cd33eba7f97aa2c9705ea779331e39963baf41072549ca5eaf8e6acb
font_02_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336

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