Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c6b95bd9f0c903…

MALICIOUS

PDF

77.7 KB Created: 2021-09-13 20:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0e72897c1afd20901c6da717ec176813 SHA-1: 850d5f77133e3e4b37efc1f5793aa40693e26da7 SHA-256: 09c6b95bd9f0c903663a584204197bb6c714d2f5431472e321047c3c89be8be0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, 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 for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • 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 http://northmarking.com/userfiles/files/nujufizut.pdf In PDF document text
    • https://shindah.com/images/ckeditor_img/files/95713108219.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0203a58cc---sibojorozares.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/24088768383.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/betogiku.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/95248726853.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/gavufarolarerupepotajag.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/8230879256.pdfIn PDF document text
    • http://prota.ru/upload/files/vemokanididokenakogos.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/xifoxelafakagetabapilu.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/65135435175.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/30743107693.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/rogixo.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/701278160.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6221766e1a9b2a34e72f7514a4ba8cbc/kidonewivitamowefe.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/rawani.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161372641206c8---zipemen.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/abccef537d5382550245efd5541b5557/seredazijuvozos.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/pikovejosowaribasuto.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/19990837459.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2b9585fcd---wavudazovol.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/33638703513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bonetale+cheat+codes+iosPDF 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_off0000cc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4A 17388 bytes
SHA-256: 36b56c2b7e9aceeabfbe3a5294e1fda06e2a3439dcd5b26b11200a7516268672
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 10420 bytes
SHA-256: 00011aca5448a9ae4798d77cee85e785a718a68b7a5346407a6ec770a8024516

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