Malicious PDF — malware analysis report

Static analysis result for SHA-256 f508783209225fc4…

MALICIOUS

PDF

92.8 KB Created: 2021-06-29 08:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f99e849d49f36c157179db5e220f0b19 SHA-1: 47ca8382a5b1dac25ebb2599111ae5fadb561421 SHA-256: f508783209225fc49ae6baaf78fea0ac55b515a1cbfd7fb37b5bc3d5b67318b9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mimpishio2bet.com/contents//files/16263053339.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc6811c67---momak.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38ff95be4---53012305616.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/mepumurek.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da64abd8114---48019309765.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/n32nf3gjjfglt0invg1dp4nef6/87557071871.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7h8n2s4drstbealaags332ucsp/59859529053.pdfIn PDF document text
    • http://clarasonic.com/upload/file/66576786211.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b16f08d4323---fijobifulot.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/17446511199.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/nixenimupugiba.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/51935158444.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b33e8cd8f7c---lotogajadimodujo.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/fudoz.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/330a26b8f27af3be99fc4813523084c9/22705736359.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/tivoxuwiju.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afcca2121f0---15065531717.pdfIn PDF document text
    • http://www.emailposte.com/pictures/rixotukuzaxanil.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vp2bbt2cbk7bp2tcvhj6ooiet5/72040015506.pdfIn PDF document text
    • https://angkalaris.com/contents//files/30388914360.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/72413986320.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/84451072704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=behavioural+interview+questions+with+sample+answersPDF 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_off000105d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEB 17636 bytes
SHA-256: aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
font_02_sfnt_off00014c61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C61 10968 bytes
SHA-256: 6c6c692bd25ba65e4844c90b566b0c3b044c74891cce5046454e38211928df69

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