Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37f5097e165b30d…

MALICIOUS

PDF

81.7 KB Created: 2021-07-31 15:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a657f816c9627f31d28194cd14cf04bd SHA-1: e7005759310e6057c78ad6e471053884b253c051 SHA-256: f37f5097e165b30d30e893da3964e11c85fc7459ea8e880cd0d32c4a50ac4af0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript, which is a common technique for executing malicious code. The file also features a large number of external links, many pointing to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://wastran.ru/uplcv?utm_term=latest+biodata+format+for+marriage+doc+bangladesh PDF link annotation
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160f8fc90ef253---sifuzonubajixizelidom.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bd4f1cf80---71567257213.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/mfftptv5f70tiqbkpr516ti711/nazaku.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/jefixiraxubisike.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3e8d71a1---89318007159.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec9124072a---85419521763.pdfIn PDF document text
    • http://nkmate.com/FileData/ckfinder/files/20210715_22FC69334C400AA9.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/82742655598.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/0a5cb68ed80eca5db7a8a1ddeb050fde/tonom.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/44408957414.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/17e692550c38d3386bcb88552437303a/rutatov.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00dee83d4---wosopivalujajovixewuz.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210723092719.pdfIn PDF document text
    • https://petek.biz/resimler/files/ditiropukixifuw.pdfIn PDF document text
    • http://plastikacz.cz/soubory/files/lebagowafeli.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/sozizilod.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/wuwafuxobudemanakag.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/98482130707.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0e8953ba4---60418609092.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/85040668693.pdfIn PDF document text
    • https://goldenapp.net/file/71812253575.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/oikpigfjble0oms2kha031ukt3/42560325684.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/01dac02169528c0f5bb246eb4a888d4d/sebokuwivenolokusigago.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/46158878529.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 11020 bytes
SHA-256: 63c45a5e2ec7435e166467c270e37809984e6f9da3340f4e2eb484f0e043e7f6