Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c104668777b1b2…

MALICIOUS

PDF

90.9 KB Created: 2022-03-31 22:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-27
MD5: a4504d2f8ad82f9c4fcc9a9d9b6e455b SHA-1: 7c540bbbc2c3c6354ac582acc4c9d7ac207b442f SHA-256: a9c104668777b1b2f4b14ba9ae0de8f64594d2de38214fd51719c091c4d82c96
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vijyaiprismcrm.com/userfiles/files/63600073962.pdf In PDF document text
    • https://juzomewe.weebly.com/uploads/1/3/4/3/134350864/kavakilajod.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/56744174854.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/162456018060c2---12436979274.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/91339385031.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/9d384c78.pdfIn PDF document text
    • https://pujosudenavi.weebly.com/uploads/1/3/4/5/134508056/9558399.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/60446115861.pdfIn PDF document text
    • https://wazefiwef.weebly.com/uploads/1/3/4/3/134369298/mipagonosewojepi.pdfIn PDF document text
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/tusasulixafi.pdfIn PDF document text
    • https://cargotavio.ru/files/file/18991129293.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/novizufanafirawomifoni.pdfIn PDF document text
    • https://voctestbursa.org/editconsole/kcfinder/upload/files/diravobuxa.pdfIn PDF document text
    • http://sanjosechakan.com/lib/kcfinder/upload/files/guguf.pdfIn PDF document text
    • https://xebutikud.weebly.com/uploads/1/3/0/8/130813588/4f9868906.pdfIn PDF document text
    • https://www.crosstownnews.in/kcfinder/upload/files/72782877293.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/98532026664.pdfIn PDF document text
    • https://dogudokum.com.tr/panel/kcfinder/upload/files/xozuguluviginiwunel.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/162148e0a495dd---gimafiletapudemesudinota.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/9981238.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fc354131f92---simisuxekuteximajinezizi.pdfIn PDF document text
    • https://yoyep.co.za/YmrXLWy8?keyword=resumen%20de%20los%20capitulos%20del%20libro%20la%20ciudad%20de%20las%20bestiasPDF link annotation
    • https://wosudinaxek.weebly.com/uploads/1/3/5/2/135299586/4035314.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 extracted file (font_00_sfnt_off0000fc33.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000fc33.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 17528 bytes
SHA-256: 2b8c0bde6d96172ca39dbc5b190404c6d766ef0d4690af706c6c8a28e72ca9a3
font_01_sfnt_off00012900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14117 10960 bytes
SHA-256: 90d2a88b43fa5c3969fdce2b89015846c6cdd9dea378a2c9f38af3791f2450e9