Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cc515f4e080031…

MALICIOUS

PDF

62.3 KB Created: 2021-09-03 14:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9aa5dd1d6d79513a2fb0232e0b456db8 SHA-1: 03eb664f8d37cefed8fe561d61f3171e98ba5471 SHA-256: e7cc515f4e080031181aaf67ed192d1c094114f7eb4fced42c60a09922467191
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure suggests a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

Heuristics 5

  • 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
  • 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://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa454f2732---6215063392.pdf In PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa878978b91---wemutigakage.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/fediludulagugopilizaba.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/74031604332.pdfIn PDF document text
    • https://cecprint.com/images/file/2446419385.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16130996228908---59642446946.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610573ebebb0a---23952624452.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e345ac9d6ecca8e95f1413586832f7af/76699996889.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6c8ea7d4---sedanukavomenawiro.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/jifemepenamiribenogugixed.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/4750971870.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0674f1b09---muvexuse.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/vugiselubegifoluwikenid.pdfIn PDF document text
    • http://zuszdounky.cz/files/tikanelezejipoxikopek.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/finisamolitawewujojigi.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/94839835993.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name//files/68554883714.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afabe5a2616---zexorafumekavawimitawewun.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/6355575520.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b32e22575ae---7797677712.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098402d00078---fanimodapakukozixogiw.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b4463407ba94ecb486210cce664fc77b/nomanubevefamubitani.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57971575629.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8948c8fcd1eeaf11f765f2892f65a2a5/linesejuko.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a86f54a117---57827184043.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=definition+of+phonemes+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 10456 bytes
SHA-256: 78674df1bb0ec76f67ace5351ac05c28e4aac2c985c5c1c37358a58c135e2694