Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0ac2fa05cc6678…

MALICIOUS

PDF

72.0 KB Created: 2021-08-15 10:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 591bdd5c942351690bae40c6cc7fcc57 SHA-1: a39df2dcd8741006752c20382202d7dd990ce250 SHA-256: 5f0ac2fa05cc667857bb55d98523dce2bdc52d1d0df5430582748a2c0f8de7a6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score strongly suggest a malicious intent, likely phishing or malware delivery through these external links. No scripts were extracted, but the document structure and embedded URLs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7266

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=maersk+container+tracking+by+bill+of+lading PDF link annotation
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a691f7a896c---jazugula.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c757523d55f---2930259995.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8ef4b838c---zafokivududobuna.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/37f482c17708a92960981e4d3b734bcb/96376156292.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/79646590445.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117f45588b41---76755737480.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/44829991424.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/kexunigivodofemevomofi.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/40080690318.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e314433d9---91860294924.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae265bfa71c496dba3a15bb62c114e8c/dosewejeb.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/xejujiwu.pdfIn PDF document text
    • http://casaalu.com/luutru/files/13737784077.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161099f70d2cfa---xefogurimivisilepolot.pdfIn PDF document text
    • http://www.77ice.com/upload/files/woweluxezatugipozokuvi.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/zezatesodejosafusoravep.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/85233823932.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/gajasimiberul.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/3562875921.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/podud.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/noruxodow.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/vebizegisu.pdfIn PDF document text
    • http://tomboy2.com/images/library/File/21499765881.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210629124332.pdfIn PDF document text
    • http://billsky.ee/files/file/risola.pdfIn PDF document text
    • 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_off0000d1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 18028 bytes
SHA-256: 06cf602989e66e1535b2e2c9e7238b1d84054d273af43b1c7aaaa2afcbb3dec9
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 10988 bytes
SHA-256: 197edb15133a6ad0c08d7cfd6f7172ea7c506ec6bfc28bce9889207e8098fb30