Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbaec0b78ca3ccc…

MALICIOUS

PDF

90.4 KB Created: 2021-08-05 01:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 27be6f26b0b5f076c8dc60186b9c905e SHA-1: 4629401ac53982bed744f89b7b4fb04db41afc39 SHA-256: edbaec0b78ca3ccc769780a5e04efd1773b315f1bcbd7c0b506795010369bb0d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/uplcv?utm_term=honey+bee+2+malayalam+full+movie+download+tamilrockers PDF link annotation
    • http://yfatc.com/userfiles/file/49698924997.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/7ec43f4c8feb5369cd2ab296f9039267/12806584035.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/neweronepawiredokiwimu.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/tobaditat.pdfIn PDF document text
    • http://mweb.cz/images/file/xadewonejijotukijabuvovar.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/67008dcf1ebc2d3192c399780901d432/dipimokadelusu.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/31200829166.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098783aa8709---23207534109.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/pegeviwavugakaweb.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8a365892a79e120df289a55d94bc72e5/34376729827.pdfIn PDF document text
    • http://kaies.cn/upfiles/210614191404675830y2evj7.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/892e26bcac8720079150602cde25eaa1/34665326775.pdfIn PDF document text
    • https://mauspro.net/upload/files/60131240511.pdfIn PDF document text
    • http://jaika.in/images/documents/files/nitiwitogi.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/ralepafopu.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/nikonimirixela.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2619bbfa7---jodiwodisemezorule.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/56773574692.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/82968362d521b4c97397c80542995bca/61023116354.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/96829617815.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6421a49a6d45295ea45e642b0f77d7c5/supotitopejufaf.pdfIn PDF document text
    • http://zonwering-belgie.nl/ckfinder/userfiles/files/92485835326.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/9aaabcb7578ead061e7e9abd824f6986/poseboborowuvetazos.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/72288154454.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/434761c339b213405840d6b2a30b5f85/benafi.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/15820039385.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_off0000fb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 11344 bytes
SHA-256: 2126c9d0b81e06873decd501680fbdf2ace327449864771683346ad3e7700c77
font_01_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16956 bytes
SHA-256: 7bc4a575846f833a863aa1f5a38c22d7c43e2ae5d87a839ffafdb1e97bdd6fef
font_02_sfnt_off0001422b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1