Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcde51707423fd0e…

MALICIOUS

PDF

211.9 KB Created: 2021-07-08 03:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58684af122d2fb2d2b096456b98bcf36 SHA-1: b01fe4d0da7207a13a724937b7c045e9a738d12c SHA-256: bcde51707423fd0e14efe0c3b57e7a830a816249045e1ea91d6ec16ff2e99f9c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress upload storage, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for executing malicious actions or further redirecting the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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.
  • 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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/f9b9071fd94200ff79e5a9a58d4681b7/vadikebesodi.pdf
    • http://creative-format.com/upload/editor/files/62675397722.pdf
    • https://realschoolspirit.net/scauserfiles/files/55719719178.pdf
    • http://naturallabs.de/userfiles/file/limezeva.pdf
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/38682392554.pdf
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/24595959151.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/2107050348072293499j6y4d.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbffb9e429c---14806984244.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/75365774800.pdf
    • http://mmckno2010.zkosuchdol.info/files/2277359540.pdf
    • http://svx.su/ffile/file/69247374681.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948f893b5ee---bedazotozofi.pdf
    • http://weberstellen.ch/userfiles/file/rugedepusejodub.pdf
    • http://riph.pl/userfiles/file/82164650904.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf7b5b92a6---66869673526.pdf
    • http://heyumpnd.com/userfiles/file///buvugitedofenino.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/wixokolegap.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea09668a9a---68176967276.pdf
    • http://shannonlakeestates.org/fck_images/file/21768103352.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160820c29cb610---dorojuresufugajumegufi.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076edf23e48f---sukijopivijaxogowexijax.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/chs1allgitadec1lbjs6i6qhni/39685598609.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/3b5254f0739d1805b377c10c53f3c83f/latadilebu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=imitation+is+the+sincerest+form+of+flattery+quote
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d3c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3C8 16792 bytes
font_01_sfnt_off0002ebdf.bin
17293c59011267d9e9dedf30162508c765c4048840f58cfb65a9d7548f57589c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EBDF 10912 bytes
font_02_sfnt_off000304f3.bin
812c73d9ba24f7f1b9aa46f2f8c349fbea87a45fcf0376c2ba49232c3e015beb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x304F3 24440 bytes

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