Malicious PDF — malware analysis report

Static analysis result for SHA-256 64502ee169f3565c…

MALICIOUS

PDF

80.8 KB Created: 2021-09-12 02:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3ad2c53dda8b37ff45a7e20108a9a6b5 SHA-1: 6beddc9f3244e0d7fef31b2a24945a8c650c067e SHA-256: 64502ee169f3565c4adfd8363ac18549fd7a68426437f1afe8bade8b2fd17882
164 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, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/9bc7fbed1a90a81405bafaa034a1e45c/jipukumikudenuwiri.pdf In PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d0771d0c7a51634d802491b14b7c727f/bewekebagefa.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/64389363147.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/72043147495.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/56653530764.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/baluvowaxuwajediwimaxupig.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/wizogidepa.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/44728750374.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/12516378641.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/naxurukoba.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377f6831746---volaxedazit.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/petexekiletuluzir.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/jugasixoxotosafabipo.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613342ea3d38b---lopivosemixulawovani.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/46111533213.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e6651c419b760a708bab8f697620e616/pafejozerumupotu.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/81493477827.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/povola.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/91716811037.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c4e5bba155ff391b93b14d89dc9d352c/gajiteritepa.pdfIn PDF document text
    • https://iohrp.org/f_files/files/duvurudulapolofi.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/26331204753.pdfIn PDF document text
    • http://glttek.com/userfiles/file/zuritisedurupujitowumunab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=happymod+application+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 10464 bytes
SHA-256: e89c751b64e31208d8be919cdd65ccd345eebc844e0da840fc2b1199dfb2f998
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 18200 bytes
SHA-256: f28c3d55dfbfde6e34a7b29e33e7428ce8e4359177ba120485797507a0d1f618
font_02_sfnt_off00011df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1