Malicious PDF — malware analysis report

Static analysis result for SHA-256 e510aeac239001f2…

MALICIOUS

PDF

109.3 KB Created: 2021-06-26 01:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 231843052b6e1d31539c2e8acc7680e1 SHA-1: 35b4ecc2f270b1146222c68d366aa132f791d3e0 SHA-256: e510aeac239001f2e9e5e52fea864c29864dd0174817462efcb0172946d6b868
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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://alnahamgroup.com/userfiles/file/22921869236.pdf In PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a6e8baab3---xeriwurixisenadizab.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/78756865395.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021530160305167.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/a8867fef826be7a8e66792e31600f325/47087321270.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ad2f75a3259b9a8b10fc3fe9d124fe3e/xeterimibam.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961addaf4f6---34809285120.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/31764140906.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072735d1d964---65937901896.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16075f01eda358---xumafozixalumeluvedivat.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/35296057211.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbd253398b---solezutetewebureronunuzag.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8e675bef---wufixenamu.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/setamomejutivudugevugake.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609423ed90b14---varaxowagidipizu.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/18619826776.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/zuxewuvijebimodibug.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/rcopd03cd3jr32l0ut9e65ij23/90521507310.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/kalofobojo.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/dce309b29f3ffe842780308ee9c2e360/49497603798.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/giganitibamibi.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/05/file/202105211200377509.pdfIn PDF document text
    • https://agatanorek.com/files/file/vedalabarusufite.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/wilonivudaxivafizixaxuvew.pdfIn PDF document text
    • http://4bx.pl/public/file/34887958880.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160772082c7e6b---lenosopinupuzofelek.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160851e7b42d7c---malepegadomojirowijelon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=specific+aims+research+proposal+examplePDF 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_off00014953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14953 10720 bytes
SHA-256: 876db670984de6d175c97e322ba8abce81e37c8d3c09ea8bf32e5c21c8bcc0cd
font_01_sfnt_off000161e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E3 17484 bytes
SHA-256: 6881ead862f31c618611a912e52f4d4200a8825a90c2cfc6ac1d0ead6d7c5b3f
font_02_sfnt_off00018f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1