Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ceb55327af1bad…

MALICIOUS

PDF

95.4 KB Created: 2021-06-29 21:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ca41935345dceae3ab63a88c0188ca5c SHA-1: 5db64f7747b77198f5d2452db811774309574fd7 SHA-256: f0ceb55327af1bade39a9274f853dfd924c29ae0e4855e860693caf767917ef5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests a phishing or tracking intent, aiming to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=tubemate+updated+version PDF link annotation
    • http://stressmanagement-karriere.de/userfiles/file/pidubime.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ml31n6ne57nlsk5n7g6in57jns/pitarek.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/laropobisawajug.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084dde1c7236---sefujomuxixowalojimufu.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e03c5228f---95875311298.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/75841970452.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/sogc39h2k8vaivrr8shhttj7i6/28004277876.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7ce906540---tabozenegikabevaket.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cce290485b4---21835345361.pdfIn PDF document text
    • https://nevisnews.com/userfiles/65476179845.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076bf59ba2c9---23440551851.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/22853050330.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/444625d37c3582299ad1a7c1e0d3941c/solemato.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/13637531228.pdfIn PDF document text
    • https://melz-feu.ru/upload/winaxexololinilubi.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/21bi8aflqg7nt1vjjmd1j0h1uk/78225945762.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/435e02cedcbb955ebb4e61e4fce399da/23839033259.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/847d77330ea06ffe72d896ddfad6500e/6234392329.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2388a2694---zowuzugeputa.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/aae9dab374d7e5fa7f5603ceef2e4ddf/10339620841.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/bazapimiruragusifidasu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 17048 bytes
SHA-256: 56501131c3c68047bb3e068a1e655f47e5a3be77b5c9b245cc5933c6d588d799
font_01_sfnt_off00012534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12534 17112 bytes
SHA-256: 6fb6ac1cbadb24f79f54c9a52ee53b22fe5be79c27a0c132ba9acf83f3f7d7c2
font_02_sfnt_off00013dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFA 10776 bytes
SHA-256: bd39eafdc5c153f21b14bfe4e94934d869968876c23ea19907e6216b448d1369
font_03_sfnt_off00015696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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