Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ebd00930a47039f…

MALICIOUS

PDF

79.5 KB Created: 2021-08-23 10:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7349c96446bd337286d5695659304604 SHA-1: d12a29aa5ca1d0a4990df14f3b1ff412a8271a38 SHA-256: 4ebd00930a47039f995e7813af0af466be76137d2bb120a4e532f9514548d859
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites utilizing the Formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7116

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 https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770991e7556---73338499801.pdf In PDF document text
    • http://mottaing.eu/userfiles/files/26837647058.pdfIn PDF document text
    • http://chieucoingason.vn/files/97707634650.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc79a99e24---93661744623.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/nuveluti.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/rofakagegowewevebe.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/96157156550.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f69c14636d8---gidememasul.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610f5ade9382b---50093776769.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ce000018c---lizemi.pdfIn PDF document text
    • http://foodchemsino.com/d/files/wibinakekifapewetuzil.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082344f53b09---48568320747.pdfIn PDF document text
    • http://bscartridge.com/pic/10287201900.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/valowuraza.pdfIn PDF document text
    • http://mega.kz/media/upload/files/xepakazubetu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a5e4e488e---suzixuj.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/78884264334.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/886a49563257ea9753a4ac8e2a52355c/sewedavabowezo.pdfIn PDF document text
    • https://o-dance.com/upload/files/12113651115.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/vuxokutul.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/466a92d9615b43480d4452e5033f85ff/pixifujulagizitereju.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/71410671760.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/robiririzusujofalo.pdfIn PDF document text
    • http://esistore.be/userfiles/file/nowugijoxodiruwawevesaro.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/22852289806.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/4949961457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=video+compilation+meaningPDF link annotation
    • 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_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 10556 bytes
SHA-256: 64667b6b2c27f3e7b017ee5d9d922095ae83262096342438bb135f722b45e8d1
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1