Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f03fcf8d1ab5c21…

MALICIOUS

PDF

78.0 KB Created: 2021-09-16 17:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fec7714bba1015ef831955a1773fc15 SHA-1: 1a4f70153f47d99ed1785af963dd06c8ff6011f1 SHA-256: 9f03fcf8d1ab5c21668b78e8b31d66be38e95c5df5ee624beb32843da2cb2f46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to multiple distinct hosts, some of which are hosted on compromised CMS upload storage. The embedded URLs suggest an attempt to redirect users to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cabanagarden.hu/editor_up/10214165439.pdf In PDF document text
    • http://pn-tech.net/userData/board/file/gozarejoranebaliximotim.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/kitivomofomapawogul.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/43868708691.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/96703477329.pdfIn PDF document text
    • http://holzbau-napetschnig.at/jesojetetuniwazugosulo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613363fd5c41d---jejakexakexelorusagunud.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/16755579678.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/41073239435.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/61384260133.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/wazepinajavekorar.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/begirudiwowagira.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/famofinazoxi.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/8861483119.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/zeniwatedi.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161351b5658b62---28793628440.pdfIn PDF document text
    • http://art-ball.net/files/file/63669138427.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6f65b6a76---venisavixe.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/84097916474.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1631024993/files/gofuwebesejuveri.pdfIn PDF document text
    • https://ferropula.hr/files/bitiwapumis.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/movezelelebiwejanes.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/86506111254.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/85952820329.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/xipiwek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+do+i+connect+my+phone+to+a+computerPDF 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_off0000cec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 16344 bytes
SHA-256: 3d73c7cdaafda7647f16dda5fcf0a9864b711608874a3d0d688098084d55896c
font_02_sfnt_off00011150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11150 10856 bytes
SHA-256: 6f280994b1f3aacb12b8d5c6df8f419c088055c3424813a108a30db0898195c7