Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b6622967aa11cc…

MALICIOUS

PDF

76.0 KB Created: 2021-09-23 06:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ac0821ec5a52049a061b6c953976cbc SHA-1: 973f80a9034f639296b5d8c3d5b15cc78dab9b7c SHA-256: f3b6622967aa11cc7d32c71352e8cec7d8a0ff2d46bdc87dd3d60a4f5591a8d4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2081

Heuristics 5

  • 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
  • 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://tindangnhadat.vn/upload/files/27218559668.pdf In PDF document text
    • http://saltokisport.com/uploads/files/dupalowetuwewuvimisas.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/tunanakominug.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/lamotufiwetugobenaxumop.pdfIn PDF document text
    • http://mynotary.ca/sites/all/sites/mynotary.ca/files/75066438346.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/31681648405.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/puwibebajomanagu.pdfIn PDF document text
    • https://pergamine.com/ckfinder/userfiles/files/babefivej.pdfIn PDF document text
    • http://parilka.by/var/upload/file/80662429794.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378cd373e51---43812276054.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/16740311504.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b942c1924b5199c53a0f6ef6fffbb781/nubinigak.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/xebamowapa.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/futimupixog.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/kirinilezarunoped.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/badotanalosotekeguse.pdfIn PDF document text
    • http://cissi.it/userfiles/files/maboxebitopezudifa.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161494cc217c73---lutawobitepodumojunaxupo.pdfIn PDF document text
    • https://www.food-equipment-store.com/fckeditor/uploads/file/55123123290.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/bozapofudujaxexajelib.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/6q5mh4h2o2hkasrurc0icpiv72/40177414551.pdfIn PDF document text
    • https://www.amata.org.uk/ckfinder/userfiles/files/pisapifopodimalegadotusuw.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6732fe73e274827aac01193ad248df54/58395205304.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/vunonalukizebuzefipunasud.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/77128930450.pdfIn PDF document text
    • http://vina2002.com/uploads/files/gixesizeluvepukexisapus.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/zagotak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=movieflix+movie+download+freePDF 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_off0000df12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF12 17284 bytes
SHA-256: 3bf9e38488da2ab5d171349f302180b4f62e98d185d5da46cce66f7fce72c849
font_01_sfnt_off00010c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1