Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc45f3d03b9c1481…

MALICIOUS

PDF

78.9 KB Created: 2021-09-15 19:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: da93438604da2a993b049d24cb092935 SHA-1: c1131b0e8f5dcdb8b7a031e5bef2f8037ef9c416 SHA-256: fc45f3d03b9c1481dc2a2efeecdb2446b2808cf2fce836ef6427803c5d4978db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ketchas.ru/uplcv?utm_term=playing+with+love+full+movie+online PDF link annotation
    • http://askaudit.ru/price/29901468687.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/kawikape.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/roxisunelozuresodar.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/ferasede.pdfIn PDF document text
    • https://mbbs.hr/files/55296428353.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140527edd879---57694868154.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/kudozisosufaxupijufesos.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/pixiwuvedolo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141244b5021f---1492794353.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/20147175765.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/vonatifapi.pdfIn PDF document text
    • http://www.bash.cl/media/file/gofasanozonodukusulo.pdfIn PDF document text
    • http://glttek.com/userfiles/file/61028188354.pdfIn PDF document text
    • https://lesura.net/userfiles/file/zimokarozadusepexorofeg.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c56d9e5673---79131859811.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/98371818993.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161319d60c653d---sokazebamafuza.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210909110213.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/47343957623.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/manitijipiwewuzepen.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/68852313252.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/womirekud.pdfIn PDF document text
    • https://aneri12.eu/res/file/70587999429.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/1769420754.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_off0000cad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD0 19616 bytes
SHA-256: 879279d241d617f5b91f2f993cdecf3a1788b2a7ffdfd5914b4de6edb160c202
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11569 10760 bytes
SHA-256: dd5f2d23b864030047dd79f3a8cac6a25905bfac9a09bb8b478254e6412cc43e

Open this report in the interactive analyzer, or submit your own file for analysis.