Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0964a44ca03352…

MALICIOUS

PDF

86.3 KB Created: 2021-09-02 19:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 33b1d3eaa3e7106d101e50ba79e7f536 SHA-1: df050552f6138a87db9b5be6ab86cb0fc8d54756 SHA-256: 6d0964a44ca0335232cb5e7fc3eb089d4d34e6fdac573648831f12521411edd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate that this document is likely a phishing lure or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://smidgel.ru/uplcv?utm_term=wied%C5%BAmin+ebook+pdf+chomikuj PDF link annotation
    • http://waukeganeast1980.com/clients/877304/File/jipifubewup.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/41539885270.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/bb6b5a4fc06a4f267ab4e66e302f18cd/rofese.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/30654450488.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/wobetikelulidedaku.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/44501361682.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/37956846518.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/vanobuwaruposivuwil.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/2961752579.pdfIn PDF document text
    • https://anjingliar.com/contents//files/55308657703.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/vowapugujafikapidutotut.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/q4k0l97rc02c2vahg1g50tma81/7857289283.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43f85a9d4---84817652554.pdfIn PDF document text
    • https://loctra.net/userfiles/file/tasuribidutu.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/xipinozexifaralupaw.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/tmklif240pl2l7pqapstmoact0/97749029287.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9b22ba897---12887605911.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/98857436808.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6e61bc62e---tamiwumazozokapovama.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/7e286655bd253b14b72c2872c69bfebf/80666008605.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/jopatozurawuxavajimujanul.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/wovejezirijigagen.pdfIn PDF document text
    • http://e-hane.com/files/rorudoxedebobupiw.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/7ea03ea1c7db4dac4366faf502b2f78b/4606376237.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ioqibcha1c02qjsftcuji1nnn2/funenexinedevigar.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/dip91l1pohoabhmeagd47vgcfg/6925299678.pdfIn PDF document text
    • 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_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 10848 bytes
SHA-256: 72a250ec04b147b671ae91e6bae831bf14e6becbf99a886d82f97a26e7663242
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 18996 bytes
SHA-256: 53e12979b34eef175006306c04c32c877439bdf501a7bf9167072d744f105967
font_02_sfnt_off000131f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1