Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4f2817d4a7a0f4…

MALICIOUS

PDF

70.0 KB Created: 2021-06-29 02:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2cbdba7aa2baf9ffcbbbb2a9999ff35f SHA-1: 04113a7a34695789396b1badace738c359394678 SHA-256: ec4f2817d4a7a0f48df9ae22024f7b47cde3590afdef9e81f260c5717b10c18a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure, with minimal text and a single image, aligns with tactics used to obscure clickable elements that launch or submit to attacker-controlled URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://jamurgoreng.net/contents//files/23658546438.pdf In PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c675509aa979fb1a68d0e1fe152a1edf/91282054602.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/fb7e85b91b8f63d3d01724e7d3c72d99/40050733052.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4908e154---68213011911.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607270a3d10bb---tuxowerivuseboj.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/nesusojaputosewigot.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/88515067002.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/9818172457.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/62391215124.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d154d9d87b---dozobaxizisukojido.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609abcdd9a519---16064004892.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/vhb46qntp8bq5dqlilm0lhg9m6/rujofe.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/5127402945.pdfIn PDF document text
    • http://artospace.com/pics/file/gilat.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/vorubo.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/knosa73em9p7fnm1909vmrn2b6/75166359828.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/n5ockb6tsl1tsss1kiumeihdap/zotux.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1b906803e---zaxenefube.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2fba590d68d4c0e6e9d0b1c7c3f8669c/23348608914.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/9fdad78762a596acc8bfff79b5c487f4/mubinirurexege.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/rixosiwuwoburisiwuwukuki.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/07e0b7cca01689b61e1063143091d79b/pomade.pdfIn PDF document text
    • http://paliukenas.lt/i/File/88781304705.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/58019082364.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=litany+of+the+blessed+virgin+mary+tagalogPDF 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_off0000b5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5B2 13312 bytes
SHA-256: 55c8b26fb30abc367e9c8c6c9db6d43db44fbf42ce99c8ca614eeeac90f2abfc
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 11080 bytes
SHA-256: 03ad4cea891843d108974b57ce5daa16c0ce0de48af2b360514b2d917af3046e
font_02_sfnt_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1