Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0bb0f5155bd133b…

MALICIOUS

PDF

62.2 KB Created: 2021-09-06 07:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e12b52a81f176aa61b57a3612a3e96d5 SHA-1: 4d4bf51e7a5fbec56d9808f5435a4532932933c1 SHA-256: a0bb0f5155bd133bfa79c5ae47767245f246d2707fe794ebcf3a18780aa92af3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm pointing to compromised CMS upload storage and other disposable hosting, suggesting an attempt to lure users to malicious sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6596

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://2acontractor.it/images/file/47508421846.pdf In PDF document text
    • https://maggies-handmade.com/UserFiles/files/poxozonozova.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/98881705936.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b654709fb44---duwudoxozumuw.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/36871418040.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/30753156801.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/retowasatimelipuvus.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/8d29ffa92ab214b08aabdca5e331363c/jelofemexojus.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/17519602787.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e48ca52e29e---869207182.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/0c26be3c513c412bf04952cee9c59dfa/xuxosapagugeduwuwa.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/11466385390.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/sopebasemujuwivisur.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/12cff98e7e60861b9d840eb108dcd208/59330619204.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/30310784152.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16102c9a62b1c3---72852806829.pdfIn PDF document text
    • http://wernitznigg.at/files/32040976288.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/gujawafu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9401cf3ae5---zipifek.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/22228667877.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210817_175630.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160800c8a7a5b6---14614123012.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e82383e417291c767717222d1c142eee/9774825560.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///lalokoledidenasexegugojiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mitsubishi+rvr+2019+manualPDF 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_off0000c7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 10880 bytes
SHA-256: 28d55de5023e3d596f2e63a6488d6a307aa45be273840e48b5e4ef0cc5c54fc3