Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe7b1d01110a720…

MALICIOUS

PDF

77.6 KB Created: 2021-09-03 04:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 92ffc79be7dfa3821d2bbbf53f83b708 SHA-1: fa713949148f0b991b7a5deca0875d0309b16e76 SHA-256: cbe7b1d01110a720a38ef0039853b561a4ae3407a6e85c530283497435d6dd44
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document acting as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://smidgel.ru/uplcv?utm_term=lion+air+crash+report+pdf PDF link annotation
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/agf3dm0mr9mtocll5mlgbkdin7/gulefibokisavesidakodaziw.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108a42b1c238---dileturixego.pdfIn PDF document text
    • https://faprosid.com/file/71968350012.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/zusutefiguwam.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/vinufixeremonurexodimone.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4dae10cfd---kamedajepixebox.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/390baaa3e9fbbba3cfcf1ca6edc3e0a2/bozujijagogu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1611041877c424---veroj.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd7b69f78---wodelisudasereludax.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/69467998294.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/luzet.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/vimimebulovuvu.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2651406c---31530933176.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa90edf15f---fegetebodijedar.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c15efc89a6e---16909657663.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/99023318695.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/9e434c164448b64cf9aee8054a8342f3/26631593953.pdfIn PDF document text
    • http://hongdacable.com/d/files/rusofexiwipexotu.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/35532776933.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5d1d8d3107233ffc26d249262b9efe8e/66686483842.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/77039977446.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/vejavunut.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/69b99c32090d751ecba512cfdc9e8b8e/31749726437.pdfIn PDF document text
    • https://abeess.com/userfiles/file/54285253416.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b757a6f0689---detojuberalinebo.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_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 16540 bytes
SHA-256: a656d11e5e06b933b9eea3220b3ffc8705e60823bad521e6fba09ba903b54c2e
font_01_sfnt_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 10628 bytes
SHA-256: 9950df6d4d34996ea0574816a04f822dfd35196d4c4bea59329def072a2fcfb2
font_02_sfnt_off0001109b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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