Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a027c6e9557651…

MALICIOUS

PDF

97.1 KB Created: 2021-06-29 02:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f5eb024f7d404d3640e7cdea2da3906a SHA-1: 8daaf6cea45f1de2dabc9fd9348c2db0aec8e16c SHA-256: f7a027c6e95576513661aa89256b0fe4e7ce0d2389dce18c40fbe37f55d43b30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to lure users to malicious content. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The heuristics suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://coretry.ru/uplcv?utm_term=pollination+in+water+hyacinth PDF link annotation
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/60077511288.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/58349982477.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/57067033790.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a7b842c80324690527eda54702ab3d1d/radizexani.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/8bqev4pkn9dut08afn74q866jo/vawipulisutoku.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/xexizesaw.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3f1c09e18---xugijaniragal.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/dd815b9c04a1a537c311e12f8ef96fcc/56886094715.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a598f1d82e8d4b8668ed99997c4ff8a3/dirinipuxagi.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8c89ea2d88d11f2471ef7edbf6cde284/zibidezedotid.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/45822508629.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/50393352025.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16098bce8e8601---4470874594.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/sefapogonikotivarugovezol.pdfIn PDF document text
    • http://halmar.info/userfiles/file/nomotapubefatosuvo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7d70d7ceaa0a15afc350bb78435cdcb2/bavawobemo.pdfIn PDF document text
    • http://fittbike.hu/files/file/wetizot.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/lizuneborazojosonu.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/faa3c85ae709e5b37161b65473794727/71155964214.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/16762420437.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/43075608041.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c352804b4c7---pinavixokavomuramujo.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/semujevekowad.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://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_off000117db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DB 18340 bytes
SHA-256: 682adb0192b663a5709514a464903899feb394be4931efeb7c5dc02a5c1109de
font_01_sfnt_off00014778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8F 10360 bytes
SHA-256: ef96105a38d1944fe715d0a33d0b43f31422b8ec0b92cb1ce25358203f40c0c0

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