Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c25c925c36730e8…

MALICIOUS

PDF

88.1 KB Created: 2021-09-16 01:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8c68544fd7b1a7e27edda4ce65d71b0e SHA-1: f6f4d9e728287387b1ac8647f0b9f3863589f99a SHA-256: 0c25c925c36730e89c26077a90c67ca0a210daf7fb8f76f1cf06c5dd65ffeb8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=best+free+music+library+app+for+android PDF link annotation
    • http://baby-daycare.com/uploads/files/202109071213501624.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4abee36fa---68220534421.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109091125189841.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/gexubozenelixoj.pdfIn PDF document text
    • http://robbes.nl/media/files/35456004778.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/46973471097.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/a2a964ce48b3f2623e6f3052d12b2c37/28376955471.pdfIn PDF document text
    • https://clinicscrm.com/img/files/72058784031.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/26818051901.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/65457872945.pdfIn PDF document text
    • http://immopolignano.lu/images/pozetiruwibapukedin.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/gififosevifuduwis.pdfIn PDF document text
    • http://honda-vo.com/upload/file/80059322563.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/42296306636.pdfIn PDF document text
    • http://doingthing.com/downloads/blog/geust/files/fovuma.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/rejitesoxorugagogos.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161361c013b06e---50040445891.pdfIn PDF document text
    • https://superpackeg.com/userfiles/file/12227450504.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f1161c4a6---belivibox.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/pomagapopelobebobuva.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/xisivitamox.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/30555428687.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/98159397130.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/905e0a6a4102cc6c363a9f3f8381f74f/17443580158.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_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 11188 bytes
SHA-256: 186c38d311ade4e2c58591c2a712741e804b31057a8b3d4bb4b85b0307fb40d3
font_01_sfnt_off00010d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D04 17624 bytes
SHA-256: 67619e489e3430113e1003d79f6486d6fb1e00ef1b301c5f59883e72810e06c2
font_02_sfnt_off00013a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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