Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd408bce88e9826b…

MALICIOUS

PDF

85.8 KB Created: 2021-08-29 15:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b0c99c8c892bad8ca684f656c6259f05 SHA-1: ab57b2f08df64e0b919228b96760947bdc43083e SHA-256: bd408bce88e9826b8a0c44686b974a11ebbc1931de2bda4e7ade7c465b53a9a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/kepurubogazosategajiledoz.pdf In PDF document text
    • http://tamlaproject.com/userData/board/file/75680858640.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7cd05c2920---15697638713.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/7727725638.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/melituwe.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/26858204461.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b43a1294b1f---75644964791.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/78fo53auqhm1p3phvn6b1vvl77/17353708730.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839cc49d5f---fedejinejawa.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/512e5917dad1a4656eb968593f68fe02/vanafelipoparofaliva.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/mibemajiper.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gapavaxepufuxer.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/lasixiwanigoruvetusosopap.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/36075808156.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/951eb1feb4afac50d9bf12f7615809a5/rilopevebarawob.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/vdh3v7gtfri37pvpdiosbml6bo/79054874339.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/30216867815.pdfIn PDF document text
    • http://nfc.soo.jp/file/35270355750.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607173b4545d0---gozuxivomevap.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/48400566348.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c8ec921e5fb91576acfdc4112211f86f/23842151853.pdfIn PDF document text
    • https://mszukam.pl/dat//file/gozigarulawukided.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/lonivutazenariwegigi.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/gmjl030l84ahu8aq1k8h4p4l0f/26560725075.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072bbeb0bd6a---11061386260.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/kuzolagekinijozixexosut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=in+which+continent+is+swazilandPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96C 1964 bytes
SHA-256: cb83427253be486b5dc35224710cea1d2a27078ad6da64da340d8beb93dbb3aa
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10464 bytes
SHA-256: 5f48ae70a54351811027d21e06810ed05f9f32ceb80d550869978cc4fa83f9a5
font_02_sfnt_off0000fa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA52 20640 bytes
SHA-256: 27643d95850ebc07a27a01a3ba15f132ae05468f36af77d99d3e540684aabb60
font_03_sfnt_off00012e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1