Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee8f483a1e37e70…

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 20:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6e55f99efcff26face3afe20bd817fb3 SHA-1: d8938003c50f406c813d4f4f5d7a61db26f80669 SHA-256: 5ee8f483a1e37e705e0d7969c00082ba0de2eb7d2a8967184a723368f1394891
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, likely to obscure the true destination, and employs a "password-protected archive lure" to trick users into downloading a payload. While no scripts were directly extracted, the presence of embedded URLs and the overall nature of the heuristics suggest it is designed to facilitate the download of a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/bbefc954a2b91bb2d05334b28cf4ac13/15863169321.pdf In PDF document text
    • http://elateridae.com/images/FCKeditor/file/99461539723.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/89541473661.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb08b57f0b9---61090116834.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/dinonewedu.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9f8e286cd193550c3ce5e93b83dcf99b/karenimezewikuv.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2df339a60561f9536f66e470fb2094cd/fubuwotijeleme.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/28593072716.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074578dc8834---98663682872.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160afbcc90b8e0---leritiwurozewubofodisip.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/dozejonipovawomiwupiwex.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/d9631ca9468f5e2bf806506c927ac3b1/jerekegewomovixubumixeb.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/84698bb08dc478c64a8bf65e70cb5c9d/zodigopavej.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752198b5615---50401712606.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/rolavivebop.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894bf50360e---loderitujas.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde5518b02d---99054415905.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0301083a7---79325152507.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080993be7ce8---zobevuzopam.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/914j7grtd3p82q84r92np8ipud/37898529094.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/e0dba60067626fe81c3ceec99b5a9193/sidox.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/8vfpka3s2f9smmpjfi9mi927t1/zopatokut.pdfIn PDF document text
    • http://apsons.eu/files/file/godevenataxefez.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/52698095851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=password+protected+pdf+to+excelPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F1 17336 bytes
SHA-256: d415e92302380aff98892c786a183b985c4209539fdb908346f166aed8daa880
font_01_sfnt_off0001214a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214A 10608 bytes
SHA-256: 17c6fdd003fe8f7d451f32890ba0c5ea945f808ea8ce900bc4f9e118b952d75c
font_02_sfnt_off000139d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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