Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd33c4db9e6e8e38…

MALICIOUS

PDF

80.7 KB Created: 2021-07-27 17:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 091ef38f1bc217d63d587381ff487b36 SHA-1: 9316b01b7aa06e6d182e8ccd693935f090d720a8 SHA-256: cd33c4db9e6e8e38ade181da81e84529f0239aa50a04a2a273d266f402af534c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories and disposable domains. This structure is indicative of a phishing or malware distribution attempt, where users are lured to click on links that may lead to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9488

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://j-line.ca/fck_upload/file/mubow.pdf In PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8101ccf1b0c180e95f05d22b22b3cfdc/94235246401.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9e7c4e402---69526901200.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb23295287---21914992442.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb426ed8f7e---lupokuvumegixurujedirodug.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/733e0d7799347cecd2e36ee89d6091c7/revoduzarexoj.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/q3fscjg5ev7ip07nmc8mfchsfj/daxezipoxomajov.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/bapopibo.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe4b4b47ad---40450971958.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/d590d3d8e240142840218527d717fa33/digil.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/8c457a2b3c65454ab9014a9c74a719cc/wofetavevipuduz.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/325eb475ed89487644518a785162192d/45289632313.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e55f249be32---73425154423.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/mamafuz.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/suludu.pdfIn PDF document text
    • https://italvaping.com/file/gozorojupunuvine.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/9962366796.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/zuzuvavegadanokunep.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/magazovobowojojizunaxepa.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e36235959a---61915781502.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/90770082731.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/39424949922.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/mozalegize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=descargar+pelicula+el+gran+milagro+latino+megaPDF 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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 18604 bytes
SHA-256: e3c7d86f5138bf9aed37ef7704b3fb8aa1992528e9ed94932f82d56d204640f0
font_02_sfnt_off00012d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D71 10816 bytes
SHA-256: 96ae21f0ebf08dc459a85f9c1a1de67fdbad39fbf26c5d6d0f5a4bee099d30ba