Malicious PDF — malware analysis report

Static analysis result for SHA-256 495dab94aaef69e5…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 22:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8c80eab34bd26b3c8ea804a3eb876e8e SHA-1: 4fa5df1d3ee92a7b901362e19559f02852d1c7b3 SHA-256: 495dab94aaef69e5f724d550bf06a91faf1926149b412768615c5fa082e542da
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://makinsushi.com/uploads/files/zulukivowupu.pdf In PDF document text
    • https://canionglobal.com/FCKeditor/file/mokanisodositukurogitiwap.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/72531164788.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/82ea83559ce4f8493b7d68cf71bb2239/nikisusupinufonukirogu.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/74559899768.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/63772106295.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/gilodowebisojazu.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfea182b26---jodabe.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/c96ajuhs4f78mrf6opsfbjept5/31534402927.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/46879858791.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/1c30f7mbdv7e7r9gts38ehq5ol/3680405058.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c88d695940---febasubitujebumafupi.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/dufevivubi.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/witugidenegijabevo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607da369d8023---tuvaw.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8542_20210601142121.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacc3e8263---2857956027.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/17920775713.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/8c8ff0eb4ac0a403d169e445f24d4925/guduge.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/7123638701.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/31390176371.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/j2ctpdc28gvrfu1tk7ej4oomc9/28730789833.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/e79eadb540e212fb3855aff7f85d87ac/jopivinopi.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/51318764282.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=writing+off+business+expenses+as+a+sole+proprietorPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43e579fa9---20503056091.pdfIn PDF document text
    • 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_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7F 10868 bytes
SHA-256: a75cd3f94639a76daf428c48175abede11dd5db8be9d099ed7c397ed63a15ae1
font_02_sfnt_off00012495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12495 17276 bytes
SHA-256: e8395d658df7d6dcd4e6cb585d2a7642308a6151637ba68c1cce28157e15cd07