Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71b9da2652e935b…

MALICIOUS

PDF

71.7 KB Created: 2021-06-28 21:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 96d330a412656ec983eab80fdd205158 SHA-1: f8f8400a64e74e8718861e4047219f99d053590a SHA-256: d71b9da2652e935b2b653bf4620daf2a14b41b8c142ef548d873aeea01c13c1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of PDF link farm heuristics and embedded URLs points towards an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/6d4877103fb38826d5cf6a250926bed6/larotezezapizubiseratal.pdf In PDF document text
    • https://clearpatth.com/userfiles/file/14252860315.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/baqv2e56gcgc05f95a8993kak0/65077942415.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/72550370289.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7232997b1---xeziz.pdfIn PDF document text
    • https://avvocatoboretti.it/file/xapetotaxidikixinuvona.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/c0be4d4b5910fc90d1c751c34a9f9aed/roxavoloxidal.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160878b9ed58b7---90213232033.pdfIn PDF document text
    • http://weingut-suppan.at/files/zubosalanutijabifonofod.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a1e95d099---lududobofalarigirefawib.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/wokazu.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/5673444fd458b7bd53625e76c0c9fe61/jatifedonux.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087a7fc84886---vofupoturomodevolo.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/8fca7cb943d0671b5e1bb8e1893cfa48/nogugen.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a7989463c---71729697060.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c770d9acc2---42164224142.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/lixor.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210624220014.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092f05857ce5---jujabilugepibiwezixopadoz.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/63562002610.pdfIn PDF document text
    • http://alkanboya.com/files/file///34708825169.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/46877593396.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075632826b93---nilopapuwetopijop.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/42c6c6d6493df3661485435ece033d7d/66325243111.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/7888831878.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/93c3e305fefbd71d392ba0e48632a4b3/30085029799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=mac+word+recover+unsaved+documentPDF 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_off0000b85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85D 15652 bytes
SHA-256: 3c015d3bcae3279992e152f58f404db45a4b45cb04abf73ff93ae2c9da1ee323
font_01_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 10640 bytes
SHA-256: 523f646775afafc7c166361f3b8868c378759ae4f3ecef319385ab7873d915f6