Malicious PDF — malware analysis report

Static analysis result for SHA-256 a300782f667bf6ea…

MALICIOUS

PDF

76.4 KB Created: 2021-09-16 08:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 44219b6833a02c0283a215ae5e07b3af SHA-1: 42312fffbf950f4fdd047133840d97962ccc0e56 SHA-256: a300782f667bf6ea5f9346f94f824636b15f577d905a32644a06fd30db00846f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate that the document is part of a link farm pointing to compromised or disposable hosting, suggesting an attempt to obscure the true destination. The ClamAV detection further confirms its malicious nature, likely as a phishing lure or a downloader for further stages.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

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.
  • 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
  • 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 http://studiosimonepantaleo.it/userfiles/files/35949503500.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/45c7192a38c02fdd2433e099e9c45c75/25064300506.pdfIn PDF document text
    • http://sententtech.com/file_media/file_image/file/15686291222.pdfIn PDF document text
    • http://twtqedu.com/userData/ebizro_board/file/vuxoji.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/15q2jdj6tfq943fmrtdjhpcdhb/guxuzofelabilim.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/32656459632.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/50675220803.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/49321613160.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/4e7dcc47cbf468585427ba042c8d4966/pasapagefasoripajenu.pdfIn PDF document text
    • http://kelvista.lt/images/files/84628044090.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/xejomiregeraxatepikufogep.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/ninisutozozolebaw.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/zasoluxonomemegokaxe.pdfIn PDF document text
    • http://logicamail.it/draft/media/natuxolivotaj.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/vadoxupaxiximoro.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5dbcb2d64065f48aa24910e7c554b2dd/godemipezub.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/golefow.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613635c5a30b1---fumigememi.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/xubosurapejiwuj.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/19266873158.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/suwukotunifixuzafodidipup.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/ruwejukoju.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/75591591692.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f394c89c9c---45442166051.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/xukopagarerakisagoxi.pdfIn PDF document text
    • http://edallyshop.com/upload/files/rizobilexodiraraveriteba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+budget+android+phone+cnetPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF956 11040 bytes
SHA-256: c9d4b6ee0c55cb1d00f0bbbd97d88909648c674376031f61a25364c90884ae5a