Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8935ffd926b221…

MALICIOUS

PDF

128.3 KB Created: 2021-07-03 21:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f9fa95955e3187789b1ce8d3841d5485 SHA-1: 8facb04a552106ccb313991beb629f4b1b46a48a SHA-256: fc8935ffd926b22160e8443c1ebc62d609f59ba76d023c89f04bfb4f71db9a22
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on disposable or compromised hosting suggests an attempt to obscure the true destination or leverage existing vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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 https://peilimineko.com/userfiles/file/42268155264.pdf In PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/663ff129ba598c5ef1507c63c1c58874/lozani.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/a38c3595466b8b1ca1668e63741508d7/92451854052.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/75397952259.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/tevusatuxurafivewun.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/goduv.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160801c4b3be38---kilaletavagipikoseforor.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/tarijudofoma.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c139a861075---kebutetekidufopadi.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/zozameja.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a490212393---vupulomebotofon.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/foniwupewetoxexepidimisut.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b109e981dc5---xinogirepekemodub.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/xafoketu.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ah9re1bvnj8u7gfinrtul7trv4/51013267609.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/85407622869.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/12cb4d3f026c9e920b6612d3766d7296/52594173037.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/86651911342.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/fubonulinulokusitur.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/66431988287.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081e20283486---50456103017.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b07c8ee7e---jojegaxivabawujugel.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/u88q3cpra1jso3vk60kncq69su/44721619664.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/hf90f7s9pihritujdk63bfag4n/87114870943.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/h1ne2gu40bsn5b7er71efglg8n/nufabewiwotesedigeb.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b747599ccf0c066134a7502d232ab7e9/salokox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gta+vice+city+android+compressedPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001753a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1753A 24564 bytes
SHA-256: 5576cf69ff4ec8814e28c7df1cbc9ab1b13eeeb6ccdc160bf01b8fcd81df6147
font_01_sfnt_off0001b307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B307 10848 bytes
SHA-256: 1207de14d527a29a5e9cef742cc374c7ce42599e3b071bdccb86941755178e71
font_02_sfnt_off0001cc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC1C 3924 bytes
SHA-256: a01c759ca0867728922384bb57c26ce98f1d27efa5e2d6d3238b9d609af61a2a
font_03_sfnt_off0001db65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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