Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae7badea0e9db15…

MALICIOUS

PDF

74.5 KB Created: 2021-09-02 08:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bf64a264a2ec401ec8463c1a6c150b35 SHA-1: 47141bf143c58eaafd52e61e90b96b5e8c8fdd4e SHA-256: 9ae7badea0e9db152d5da2babfe2851c0162156c176cb5fae0886a7f38d955f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or scam campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • 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
  • 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://infrive.ru/uplcv?utm_term=croissant+in+oven PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b911b4274971922bb9bab3ea29aa9b0a/21014075782.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/nvsk0nmlutka39ts890la90m70/lokiridi.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/9847941051.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/tifoku.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/kevepofixolikoduxajerewo.pdfIn PDF document text
    • http://jucal.es/images/file/vurekipotazobeviwigugoz.pdfIn PDF document text
    • https://tch.lu/files/files/2319745548.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5d2d9a55---bajiluxaperixig.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/kokobanova.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/vepumitukujopatejixiferu.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/jiboxovurizuxil.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16099571902307---27529216681.pdfIn PDF document text
    • http://vkp.ru/upload/global/file/kupejuluredo.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2ae999e5270f76514c1fb7e59b061eed/lunapatofuxorogelumetezom.pdfIn PDF document text
    • http://446888.top/userfiles/file/93366160.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/xevizopimiwagig.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/46957020469.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/83084881691.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/14f6e8a0a019485dabba5fe2d20b815c/viribosepinobivetun.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989e447a5c2---sixinakupebuzu.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/31779020999.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a273d5ce2a2---jamuditorefig.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/jaziwuzorijigupovofifo.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 15624 bytes
SHA-256: 841b6aeb70c10723ecde12d972edb0acc63fc739b91aa82bc6bae32733280e63
font_01_sfnt_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10491 10152 bytes
SHA-256: 86b3e3390e387193b15791a72d0fdfe2dd1cacbf45f093c0ea6212f9cfd9654b

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