Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af3af21bdab4d8b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 02:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 159836a26484013af89169c27c090ca7 SHA-1: a9b040d4eef3bad4f276167e23cee45cdf0a30a9 SHA-256: 4af3af21bdab4d8b940eba5a2a6004503b2d9e6705333b23473a85042f10bfe3
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/58229276298.pdf In PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/54873264308.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/41043709124.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/vefodibowigotav.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/92997761397.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db4c5c39b0---susirajudofagixidarorofep.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/tavamezejupopakefizoxif.pdfIn PDF document text
    • https://gfwofficial.com/ck_imgs/files/51567689092.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/57109944464.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/mologaz.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/1161563264.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/tiguvamidige.pdfIn PDF document text
    • http://lyzph.com/userfiles/file/Fl202109110756519127.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/58175760764.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/57338721327.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/xesarogolesomojapojagigo.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/nuxelasita.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ei8lmkk38tl1g5iienjp6knoje/80372543213.pdfIn PDF document text
    • https://advik.net/userfiles/file/95932620004.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613656d7d00af---58816403840.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16135f626cb2c7---11314330686.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f464a40d8c---27028749297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=matrix+streaming+onPDF 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_off0000dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 18428 bytes
SHA-256: 10ab99253cdfdf1c96a1c597fead5c43354f7208a66768a1fcaf171a559dba39
font_01_sfnt_off00010feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEB 10500 bytes
SHA-256: da490f7d46dc7d3ec21cf441fe3b1bc2790e03c29a5767780c52391b2f871345
font_02_sfnt_off000127d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1