Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6ea447648ec215…

MALICIOUS

PDF

98.6 KB Created: 2021-06-28 02:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b0440a9b1827432e15712de4859565e SHA-1: d443074e5f20395bb2ef05a955709a6ce7711446 SHA-256: 1d6ea447648ec21556bbcb0e0478e936501019ddef85e0c8a76449c58dc36f7e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial security scans. No scripts were extracted, but the presence of multiple external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://drafthe.ru/uplcv?utm_term=how+to+reduce+mb+of+pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/44981209354.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6b3eebef3---tamosujologog.pdf
    • https://kltccompany.com/ckfinder/userfiles/files/66835314266.pdf
    • https://itacademyindia.com/ckfinder/userfiles/files/lesilowatipomilejobol.pdf
    • http://greenplanetnepal.com/userfiles/file/tegapozari.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d083b0e8d---mesunokipupek.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/a9he6bsda2gdaktgs5077u5g22/41631165263.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/hjvm1he0e1i1hbbap91b2vrsne/61151923745.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/95f99dbfc305776709f89c916f976a6b/dedawuzofedepin.pdf
    • http://fritz-fahrlaender.ch/download/jukipegoleb.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607bac0065833---83100910643.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/od0n81s2pja5k48oud3g6sel16/6283433466.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070ceba8a246---sogig.pdf
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/3190ca3ba0aac694c02b4a4e0ddc1a7b/nalusanuxuzeji.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e89ddb448b---63523103087.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc53086ad60---47934664458.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c9bbc2e32---remeguwusat.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/73d5daaf1f469d92db06f723d6c80869/fefafuwajugag.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072863ed80ed---72094883902.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab41c420ae---1738033621.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/kofibanob.pdf
    • http://spoilersmensgolfclub.com/clients/865201/File/gogisefavoronivetakoguw.pdf
    • http://creptiles.dk/userfiles/file/31273191124.pdf
    • https://kham.vn/userfiles/file/29585078795.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51eea13025---pesapaxibasebogazo.pdf
    • http://abwferrellpkwy.com/uploads/files/13137891891.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bce4c9e04---mixusowibulekobowawab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011df8.bin
39ad1384e55ad7dbe2fe133c4497b15586502777800fe8a98b1e8cfac56b36de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF8 10524 bytes
font_01_sfnt_off000135c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135C0 16792 bytes
font_02_sfnt_off00014dd2.bin
dc87c6451645dd8b88f35c541d14eedc6dbb4fff51c746438962fc26b3df305a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD2 17980 bytes

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