Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b9e503ded4d162…

MALICIOUS

PDF

91.9 KB Created: 2021-06-30 17:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6dbc112e30c1a17a4189bb97f31c08d0 SHA-1: 779d3020a8c4ed32b23fac47c93ed244ea6ffff6 SHA-256: 38b9e503ded4d162eb4d10d579b2efa34ef5da1140daad22f61190eb56733239
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://krisoc.ru/uplcv?utm_term=wither+skeleton+1.16
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/86805fefa6b4b385718d40dd8407cfd5/sutemefibanejoge.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607093c98a65d---zotosizamukimimufapes.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e17f3ffbc---wupaneposolidute.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/jg96cmo43j88hi0e1mue2lk0m5/fapeserewepumetapeluxemi.pdf
    • https://ntpuvoice.com/ckfinder/userfiles/files/64924891328.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/ec9ec4095e19e092762a16e9d62533fe/bevonulepi.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/8728f5caa92bd3202f8d1a528220887d/fogasetefovukonezib.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba7c4eb76---saxufik.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c141c3149fb---jagegoxujume.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ljlbsrudtodj152etmm0qkpe25/nekadibaxomaw.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/zenafajodumamexilekaloja.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/gei6jjd19n82da7l493v7tu32e/36065962050.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bbe379fca---1413240252.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607359f358e6f---petaniditofafege.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/488c3b2604d426983cfc2028ab8dce4e/24823928237.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745cfdd3a1f---97017322221.pdf
    • https://panificiopasticceriabattaglia.it/file/xagewixepezogiruzupepit.pdf
    • https://cmsschoolkg.org/userfiles/file/51482757045.pdf
    • http://tortsurprise.ru/upload/redactor/files/belag.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/d39ct4obge20s7m8ph003ij8th/20659688683.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/toj5oq63la01ldcjrvuqauohri/68476581742.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/54d89644c2085327c0b9198424683575/53935861741.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/0enisshfvhcgj5og679nrt2s77/metabobuvafi.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/547105839b0defcdcf5c0e17d9696599/jokoralivukubopix.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/hcarjnj8gpkieje58gnb78umeo/54865274893.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed23.bin
e55f5728194c9f2b2a17209dc368466afc2d73a4c3f817de14700870ead26bda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 10416 bytes
font_01_sfnt_off000104c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 16792 bytes
font_02_sfnt_off00011cd8.bin
c473dea264f277240e2e9065aae9a56c21e949fa1ca872838696cd1b5b86d534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD8 17748 bytes
font_03_sfnt_off00014b58.bin
a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B58 16064 bytes

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