Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e285bf50e716ef…

MALICIOUS

PDF

86.8 KB Created: 2021-09-06 13:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4a9df38fed5ac881c57e3ae831136726 SHA-1: 9565da59494d06e6325f83482fdc1685b4ef9a26 SHA-256: 95e285bf50e716ef6e491c81dc87e0b8a93e372869b0fa0c113646669218aa8f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

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 https://crysiq.ru/uplcv?utm_term=ladyman+philosophy+of+science+pdf PDF link annotation
    • http://yuha.be/_files/file/punof.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/0d7d2f044196ccfb626a7ce32248bd47/sisuvimajijog.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6824f7d9d8.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/47536256784.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/69164920226.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60FF614FD4D65.pdfIn PDF document text
    • http://charlotteellisscholarship.com/clients/a/a5/a56794a54ce3a7e2a8fdc514f00cf952/File/wirubejunijo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0bda2504c---wikik.pdfIn PDF document text
    • https://12tiga.com/contents//files/bozulefabefeteporidar.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/29803622019.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/danewuxelol.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aa518732b16---waverogifusib.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/kazuwilub.pdfIn PDF document text
    • http://goodwynva.com/clients/d/de/de91e19d235d8a3764238851c6b73f99/File/72834645195.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf4eb0fd5---24016319791.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/pikoxafababa.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/19242181933.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/96712059621.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/c6aod671hcecc9u693isvp55ou/81558349545.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26ebc105f---66765789151.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/52998786846.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/getunuxuxekixumuteki.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_off0000ebe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 19056 bytes
SHA-256: a6a0126a7d15439a8b6506b580ba15c97644c87f2f9df62fef7715ad35a55863
font_01_sfnt_off00011d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D27 10756 bytes
SHA-256: 95d7f5be476191a7b3b6c6d190883f03ec992390a0b95dbd5d9f3d55662b86ff
font_02_sfnt_off0001359f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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