Malicious PDF — malware analysis report

Static analysis result for SHA-256 379c18c391de8a1e…

MALICIOUS

PDF

67.9 KB Created: 2021-09-26 15:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4688707fae5e1250ca15c41b25fc2177 SHA-1: 0782fab211de332946bec730b4582b1f585089e0 SHA-256: 379c18c391de8a1e3421c49992e24b16496dc2ad55822a9c9d418e5b6aeaf823
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://chcial.ru/uplcv?utm_term=camera+lucida+for+android PDF link annotation
    • http://gfb.it/upload/fck/file/ledasi.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/vif2gdfuusvbv1khfsqbt7tk4q/gadowokup.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/sesiresewesupagololexufu.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/71b9e7ed2550733a41de38e5dfdea07c/vaxesidafiwaret.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/80592231882.pdfIn PDF document text
    • https://aneri12.eu/res/file/6335806660.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/67602640875.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16143c6dd39375---45512488419.pdfIn PDF document text
    • http://lepixz.com/userfiles/file/wibix.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9cede5afd30b3d35597c68ce67b124cc/27876678688.pdfIn PDF document text
    • http://hzaidele.com/images/upload/File/87460070729.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/72476491637.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f903d9306b2e43af2fa6a7ad6903ff86/fijal.pdfIn PDF document text
    • http://www.bash.cl/media/file/rizerebawivodizedilez.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/aa874c015c515539940d538157b91630/12887565895.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/17e482f763c2057bc2dbc225ca53eee0/vegelovololewef.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/67770461951.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/22281056215.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/2659298178.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/54294187403.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145fc3ecd244---besasafuduw.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/85556631968.pdfIn PDF document text
    • http://vhktn.at/images/content/files/jepiso.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_off0000ae49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE49 14588 bytes
SHA-256: 459379a26aaceb4721a545e6880aff3db980f7f3d40678b99fd003fde34879ff
font_01_sfnt_off0000d2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 10500 bytes
SHA-256: c0d912a57f25db04fbd9f6864c885351cbe826163c0cb1db1e10d71aeca2d908

Open this report in the interactive analyzer, or submit your own file for analysis.