Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a34e67c57c2eb7…

MALICIOUS

PDF

171.3 KB Created: 2021-07-04 06:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 979b929def8ce709c1c370e66d4a7f61 SHA-1: 1d96309bf2ff36d2782835d10dfa4672102c7542 SHA-256: 68a34e67c57c2eb74ccb5d850d05d007de6f10814db4f0e74f5b53204ec007e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9679

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://wastran.ru/uplcv?utm_term=palm+reading+education+line
    • https://sentinels.ro/userfiles/file/pexadowad.pdf
    • http://mpu-beratung-brendle.de/userfiles/file/69546852513.pdf
    • http://urgentcarepb.net/userfiles/file/54867134084.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1f173d11a---17353420565.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c85cbd7a72---sewerutovonedotarufi.pdf
    • https://gym-rectif.fr/ckfinder/userfiles/files/22570599128.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c247ebd7c84---27952720677.pdf
    • http://studiosiciliani.eu/userfiles/files/41890453348.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd82df51733---92466522294.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4090f73c41---70719757350.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e1f74a74c---81159450775.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/5a816a1c0097deecda97edb1c97a53fe/41762307285.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/52c1c62107eabc57fbb81781215f4311/jajupomugaroxe.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609465181b9aa---1358818396.pdf
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/wiwunubugod.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8feb5600780815600728ee7d423ece01/56077396879.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae2810f10---makobutir.pdf
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/sogokilesaratisadalotule.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0a8ccaff---25013265275.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9568d7fcb8---67321463673.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7256e71cc---zarukinogop.pdf
    • https://baobihungphu.com/media/ftp/file/36276563543.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8fc1ec45e---dewabopewolirojoxila.pdf
    • http://anhbanglaw.com/userfiles/file/99271033796.pdf
    • http://crystalcleanwindowsmn.com/clients/c/cc/cc5f591ab25ef7bbd7a205b431f39e57/File/35368663885.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_off0002296c.bin
15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x2296C 1700 bytes
font_01_sfnt_off0002317f.bin
8d0d8d3bf61dbddc79e6c51dad0479da28ac71c3707e54c50c8d25dcd4f17025
pdf-font-stream PDF embedded font (sfnt) at offset 0x2317F 24296 bytes
font_02_sfnt_off00026eca.bin
acecc2a0b3c96f7ce7cafd1074feaafadc01a89461644c8113891414bf6bc0e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x26ECA 10648 bytes
font_03_sfnt_off000286e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x286E6 16792 bytes