Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ae6de7723a00dc…

MALICIOUS

PDF

94.8 KB Created: 2021-07-01 23:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aab8cbb748a44cffb44d1b8344b3f132 SHA-1: 84ed09c400d1210f7d946b434f59a024fd41981b SHA-256: 09ae6de7723a00dcbfa449e43a754914504e78574bba4b1b936b8612e07949f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort to distribute phishing or malware lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://archism.ru/uplcv?utm_term=parliament+and+funkadelic
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a9144e6198a75e07f2f451fcd5c8a956/zuxula.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/f8858edd16428f8bf20a08335de8fc92/dunapekefalabezuso.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78bd43f4da---fikefuvegafe.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qp2ut2r7auq31po7aj4b7b9o07/84555456275.pdf
    • http://camionespanamericana.com/userfiles/file/kasirofexetirewili.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdc38777d1---43792030047.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/asgd7itritc4ocmnqjk7kkaqo7/90181978031.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/48h1es7nqo07uqr7hrqvqbpnp4/52278108707.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d8025ef7e---95628763036.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a3becb4c4---17398396803.pdf
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/291562dbdb8418d39896607368bc92dd/10855288196.pdf
    • http://sahamit.net/userfiles/file/46808698101.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/ce31570ce620222c194667feac14c921/95099931606.pdf
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/5d6c9da9ecceb4a961f09a7c6cf68947/visufazusoleposezop.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/eda7c6e3b494bdde232ab9fa1c1cb95b/zoxamojuresadogezepujidum.pdf
    • https://pbchistoryonline.org/uploads/file/95606324134.pdf
    • http://rkmaster.ru/uploads/files/ruvilutefofefubejaxedogaj.pdf
    • http://kozszemle.hu/uploads/files/tebozo.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/48352f26bd730db5073f1954c161684d/fovilub.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ad7c880a768f97641374a75bd0c52a94/46518406056.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce4a2ec129---45865712151.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/pglfrio50agluvkmngimhojmmj/jebeme.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/htfnrq0ck0a4ukr465sg40i8dj/15594401143.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011090.bin
fffa5c8049666bd92875fe8c9128a7e77ef799f105a8e5f4bde6ccb86a50ef65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11090 17304 bytes
font_01_sfnt_off00013de1.bin
2ce2fc7c5dc0c24729412c87cd931a3ba9d25b4db7254d41494c044e602a6c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE1 10544 bytes
font_02_sfnt_off000155db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x155DB 16792 bytes

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