Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5178845e59fa1eb…

MALICIOUS

PDF

98.3 KB Created: 2021-07-12 16:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: eb61609b64261d31ab24c824c23329ae SHA-1: 29fd1aed59e1dcba563f3370d4d763cc8a76bb5a SHA-256: f5178845e59fa1ebe2971d3cdffb13c236d76bd51b60207e89b9293de533e9c3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains, suggesting a phishing or malware distribution scheme. The document body is unreadable, but the presence of many external links strongly supports the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://location-appartement-venise.com/italie_documents/files/88917229402.pdf In PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a34cec04810190de3d755cef4b7ad6b0/51328596960.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/fd97df57783c3299ef32c867611d1a8c/96331152939.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/447023ec2f55ca2fff9fa1e3751621a3/xumitusopali.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/32876717441.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/e46802d44c3ec0ed9877ee8e0d902d5e/37822000700.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/38326744704.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736ba837f04---minasez.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff39dd2203---tuwagopilojubitab.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acaa7fe4c59---kakijufajewakoxilulesapi.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/medulavazuwupepazef.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/a80453b3e86fc566bb212d4bb0e4880a/norukoxejizosamimena.pdfIn PDF document text
    • http://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/silekunezatiloxaxinowune.pdfIn PDF document text
    • http://rld-carbon.ru/file/96070775993.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e26b68ca96---13561198726.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/ec8f79d49e2513033df6da86b36d2e13/lelojuveterez.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865e9681717---tugiziketigovovelagosisav.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/pazedututeluteb.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/29903900314.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607049b007966---medolu.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160747e4053bbd---dupade.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b28fb3b85ba---tujopifulafapezazud.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/3doe82kedkbaut60bl3ml8su94/sozutugavasarudi.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f12eab2b573e2cbede16a8b7824df533/61649566724.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/vivevinomumebalixepa.pdfIn PDF document text
    • http://southfieldhigh.com/clients/a/a2/a202dccd336a30abee2d0a4364b9f07c/File/fuwaxeko.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gejukuxosamanevunesifiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+epistle+to+the+galatiansPDF 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_off00011e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0F 17500 bytes
SHA-256: 7284a68abb2ab64ef4b099ba25b32a1bf4b475cb4e07f83b9197c906da6dc7eb
font_01_sfnt_off00014c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C27 10396 bytes
SHA-256: d430379a8638f9e28bd383753e6d91e3188e896594b3993dd56408d96685aa53
font_02_sfnt_off000163a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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