Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ad0197a66ae46a…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 23:01:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bc6e338db30fb8b89b6b903b7e33676d SHA-1: bd0094d83de9afffd7a54e9a6170b8b011ad7dd4 SHA-256: e2ad0197a66ae46aefb26150035ccee528b1213f1c2db00fa257779daac75347
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm designed for redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and link farm nature are indicative of an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://demo-calson.garment-pro.com/ckfinder/userfiles/files/92715786361.pdf In PDF document text
    • http://chiaranannini.com/userfiles/files/7674761980.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/31901250510.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/totezifebutazibo.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fef1d9960f---70965842045.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/49d2ce56b5c5056063546ea589eb3330/5171030086.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021090205061650.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/85865586140.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/wogixaduge.pdfIn PDF document text
    • http://deauville.ru/files/file/gusubadufidiwigotubud.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f368fe6552ef0a837eca960a61656354/mivikuravawefoketu.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/kawetobinovifi.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/xitixo.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/dumil.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/bimopumer.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161362405dce14---risuseminotabunoki.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/92548090350.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/vibefifubib.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/nonenemarelazifu.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/61195968932.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/76173812326.pdfIn PDF document text
    • https://digireg.at/upload/5648584860.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+bonjour+effect+pdf+freePDF 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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 18784 bytes
SHA-256: 8b2e6c04f11d790808564f77c28d0ecc720871697f3fffc445ca41fb0d0af293
font_01_sfnt_off0001098c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A3 10584 bytes
SHA-256: 35ece109c77ea76ebeefb162d0149399fe2a1ff8d324b0250e31434c0a370f24