Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd882a67327e1247…

MALICIOUS

PDF

65.3 KB Created: 2021-05-12 08:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e286546e16b4ee96507125299d7dbea7 SHA-1: 6e079d7d2041cf1758418c465c7b434b8aae44c0 SHA-256: dd882a67327e1247e604f6191b56ec75d34c343b1cc52fd587ed099128cef106
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious, likely a phishing lure disguised as an Excel sheet. It contains numerous links to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further malware. The presence of external URI heuristics and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8461

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=excel+sheet+for+heat+load+calculation
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4a7262df909c3de2a9c895006ac3434a/limisejijuvegedikokunemux.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080816317951---mulafominege.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/75db83e8ebffd8a28aaf7d950e6f38c5/gezaw.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830c2375f8e---wosafekesarewaketufiriw.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/83e639055da9246c4d01cbd6d5819f26/mupifarivogeniduzipusoxa.pdf
    • http://aarogyamedico.com/userfiles/file/17978799732.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fee854196b---28317681877.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878aee03664---fupofivur.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ace3e30d6afaba797a0ab71ae2eddd9d/vuxozeladasuxexelijaliwir.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o1r8ng7agnb8dphe4v3j4t0u3t/69919059459.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d94c59e62632b9113f2203a41eeeb6e2/62178744204.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c876616f94263191ca6b5aa4410c6e8e/72084195363.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/6e1cf8c0b96f10db061beaec1a597288/basab.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c034f917---parizurobevizeb.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160991ff01e72e---tepodide.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/4d41d4edf51ec4d3897eede19de38981/lanerutazojitunip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2c.bin
d72a09366633ce7879b874edd0b4a010bcf5814fd65ac83a52c9c52a487b2382		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 5132 bytes

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