Malicious PDF — malware analysis report

Static analysis result for SHA-256 e094f30a44a896b0…

MALICIOUS

PDF

78.6 KB Created: 2021-08-03 04:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b045a78c137e37f682dcb6caa7d22a7f SHA-1: 5a3dbd99291135288e3589ee68eb2ab9dc084314 SHA-256: e094f30a44a896b0137d246d16ca0021cd9681c5e07237d79f0cecb10f693ba4
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/jojazugipe.pdf In PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105061644248300.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3f02942f0f550686e0eacc8d03f93b7c/petemaxafafaxexivis.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/76351744666.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/11703512121.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/pugujiwuxesi.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/c1734c50654dfb87d58fdd10929827c7/65887806894.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/6oqg72iu825j6mv5vtmjfc0ue7/jowakonafepimufe.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/29044290776.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab742de4323---muwadewewodigupobajari.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/af70c217142d7691b6ef462f9d46dd76/sutizojetepukejineba.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/kojik.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a551e18b6e---71139837270.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/df9ad989fee8084693f3fa72b6e9cd25/duzoxedaba.pdfIn PDF document text
    • https://sapporopools.com/contents//files/20153315677.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/nonimazozokesamadedipiper.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/88729101003.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be60cd5163---roginekiliguwe.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5c31ea204ef05bb996137db753a652cb/71633445904.pdfIn PDF document text
    • https://led7.ru/file/zuxoketokupotajetaga.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/satutamufudimepufowuxopu.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/kagojafasoxeloputizub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=wps%2Fwpa+tester+premium+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 16572 bytes
SHA-256: e0cd818c6f6278f6cb36d9cfe479889e11dcaea32c7893a89893082cdbaec988
font_01_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000111ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EF 10448 bytes
SHA-256: a3841db9deee42d3d35769ce8da4dc7074d5dbf806bb1f8d2eb02cc61ce7a6ab

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