Malicious PDF — malware analysis report

Static analysis result for SHA-256 8999bc47c7785284…

MALICIOUS

PDF

78.2 KB Created: 2021-09-04 07:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 18644acb4a50caa18298c8defc1cf276 SHA-1: f2e7b3ad66e572cc92f51e9f55348d6266e1e70d SHA-256: 8999bc47c7785284b7712659657259555c1480e5860df11fbe35cea737a62bc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=ethiopian+tax+accounting+theory+and+practice+pdf PDF link annotation
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160db5f0ee274b---defijaxoduzewimopesasoxal.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/paluwu.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/7u6qqve3ufirqq8gqhk20gq9l4/95001256174.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/waxawalodumikake.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160790a6383563---69560993702.pdfIn PDF document text
    • http://goergenpainting.com/clients/0/0d/0d1038892961fdbf96b6a8e7e8daca8f/File/41415866146.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c34df699d2---32749538657.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131f4bfcc6ea---fifemaxodeke.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/83334646805.pdfIn PDF document text
    • http://sooclose.eu/upload/File/50435415598.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/41798358926.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/68618546024.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff92b5a4768---xibibitemekexabada.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/ribufile.pdfIn PDF document text
    • https://trinityautorepairs.com/uploads/files/63503635104.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/87866829856.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/63995754843.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/80439836143.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f21ca381409---wisojeg.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96b1b3f8d---91647739823.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b558ac7e63c---vubusikawuserowasoro.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/47769017645.pdfIn PDF document text
    • http://princeverma.in/uploads/files/76972604437.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_off0000cabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABD 17836 bytes
SHA-256: 1f735a01816b1833c2f68fd96fd99042e3f51d788377758b74ad96090feddf7a
font_01_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 10984 bytes
SHA-256: d227bf3dcaa3f582e1cbec1556ef6eab483272611f7c9e8625062636d7cbeba9
font_02_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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