Malicious PDF — malware analysis report

Static analysis result for SHA-256 de10d6a0bdaa8953…

MALICIOUS

PDF

75.8 KB Created: 2021-07-24 09:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7ff256114c5333503454b2f9a89785dc SHA-1: 9ea48f473384fd1373f8622b325aa58360a85973 SHA-256: de10d6a0bdaa8953cce820ef8eb9e944aa61f7a32b2e085a4e3b5217820a88a6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to manipulate search engine results or direct users to malicious content. The presence of multiple external URIs and link farms indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://alshaabcoop.com/userfiles/file/86014170944.pdf In PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tg93jdkiupka2bl559ujjga460/16676468517.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a670cbc6e0e---78942610836.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/4csgb7l912qur4hsscrjpdo186/49312465347.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/bajozeze.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/korisuveja.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/48840235853.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/46778301509.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/nijuz.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6f7c535be---ritusog.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/bovoximejebezobaro.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/58220589233.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/5pjpo7d7rtg1j8u73n994snhre/jokupaporu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/8151aa68871e933d4c22ba019d0f1e65/14882548667.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c740547ca3---45749637282.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/16918163648.pdfIn PDF document text
    • http://immopolignano.lu/images/xujivelawa.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/j7api497srhevbe0002am6b859/kaxerisewuloruledumel.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/derimepifitapaluwawu.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/20287728652.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/75689969231.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b85244538b---30671356715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=cambridge+pet+vocabulary+list+2020+pdfPDF 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_off0000c39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 11552 bytes
SHA-256: 532c0651d8c9453567c0d83ad79352bf84630ac8c271c465bbdf2adfcfec950b
font_02_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 16548 bytes
SHA-256: a21d5762e4a0761e3877a07d12256d2fe9c1740577edfe06d76cc80b847cd13a

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