Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1055dcd6648f3f…

MALICIOUS

PDF

89.0 KB Created: 2021-07-01 09:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6273e1b9c92f1c4b9c084ec203065c62 SHA-1: ebe92d44d6f9fdf77c07f6a58ad16894055eeb90 SHA-256: 6f1055dcd6648f3f84060ed65298e864bb41f99dba57b1020164e99063082847
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute traffic to potentially malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://maybomnuocdanang.com/uploads/image/files/48659681550.pdf In PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/e24tsubtciim3uqkerudjicm3g/metepopaloruduxo.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/e12ce2ee6287e01ec609303156aed4fd/bakerewaxizedi.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081eaae481d1---kirolap.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5e1542121---gugipami.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd8feafcd---powimegatesi.pdfIn PDF document text
    • http://temple.mo/userfiles/file/jekofogosugok.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e80874b71b---nunitipofomumeveji.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce27b6b48---kaxutedateterevufirewelix.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/96220653783.pdfIn PDF document text
    • https://ebooksweb.net/files/file/vifezezomupovifujivasiw.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b00fa818f1d---gokerimumagikateve.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/lixufinuxajesetatibodexow.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0ae152a80a487df668759bec359636f2/jijajibalive.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/45310552500.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/jepezewibitatuwi.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e872426119---47084217443.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/7cef6ff31af8ec53e7f55c0686c43795/xitis.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a753e51b00873bf103b0c0b5b2592cb9/jupege.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/tomokopun.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/xafibabesovelove.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed2a211a1e---29650163526.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a747b157c---rafujilazidexubolinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=find+subject+in+sentence+onlinePDF 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_off0000fceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 10448 bytes
SHA-256: 31714d2f3928c6b7dc8faa0bf5501a0b9a7c8f7c674a2ccc0c60f30c1efbf5e1
font_01_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 16272 bytes
SHA-256: 8fe924a905031db8399c97900085792063eb11d8a0df3027d9d9cefed5c0e2be
font_02_sfnt_off00013ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1