Malicious PDF — malware analysis report

Static analysis result for SHA-256 245f31472a443075…

MALICIOUS

PDF

81.1 KB Created: 2021-07-06 20:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 777d96dbe974523e3ed8b7811384a24f SHA-1: d5066d74e5dee0310c0649c07f1705b73be50dd3 SHA-256: 245f31472a44307511f50f152829e468dc89dd61b2b362dcd3c28772ad5e4734
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. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or untrusted content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50536077240.pdf In PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/15e337ff34da03b68aa44eaef1c02b67/36282120048.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/pekomitig.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/gebofotewafenufakijudin.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/29048414652.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c63650a9441---wanubikomebijusodemadep.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/eupookf4q76qsrbf3uj7enep95/xunikudij.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8437d8cee---93998439352.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee584bda0---98065980424.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/e1d56b60772a5121d6bf551787184f25/dijekataresuwezifagona.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ddaa52150f1---8592108020.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08fbd46de4---83450775163.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/natomanip.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608967691d84d---78373681921.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/6219018dff03a9c934f89358a48bb30c/zoluvopodelu.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/6bd50e4317c8841a26e7eacf7061f568/losedusevinejupemasaz.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/6a9f6b3afe99ecb049232a81e210b267/potekobirorujaxedodexibet.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/sazakodawifugulefebep.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/kibebegazuwa.pdfIn PDF document text
    • https://webmenuplus.com/images/file/xodudopev.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/117695637160a94ec54adf2.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd18815b9d---xezidogasasitegelu.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/wukifuwasuweguf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=skyrim+master+difficulty+guidePDF 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_off0000d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F0 16736 bytes
SHA-256: 17443e4ed9c44140778f4b28f8336ff57a0a5b950fc4d8b9d6d0ca45c073f3c0
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 10976 bytes
SHA-256: 7003ea974d9dbd9ebf9dcbb519b210f58e40db9e370919a0d1721bc2d382bacf
font_02_sfnt_off00011f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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