Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fc9bbf2b712c8e…

MALICIOUS

PDF

64.0 KB Created: 2021-06-20 13:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ee3d7f4aea6d1929d58c20c3c69bee0b SHA-1: 776aa1fe00522c457ce75525c7a97320a2747901 SHA-256: f1fc9bbf2b712c8e811774679b5265534657848f68ac46173d43ca1e02ad9352
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing lure or malware distribution point. It contains a link farm directing users to multiple external URLs, some hosted on compromised CMS platforms, increasing the risk of users being directed to malicious sites. No scripts were extracted, but the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8603

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 https://infrive.ru/uplcv?utm_term=telugu+wap+net+mp4+songs PDF link annotation
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71bc7d525---dozamawevimokegidi.pdfIn PDF document text
    • https://summit-christian-academy.com/scauserfiles/files/59535809031.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607464f5abfcf---dotudogixituwovir.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ce94c8aa---23453834583.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/puzulexejasosomoke.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/9maggj6oi030pgv18m66c5v2cc/vadowi.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f178017f6---80359866090.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/5c915432a016729a9d374b7e513915f0/34025592130.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ff41177b7---37021471810.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/0d81f0b5a55822ebf415d363be4ac121/26059166648.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/o1kbpgsd4kd0b3d92rq6fbmk85/1963692603.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a370e4c6087---bibes.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/datemirenazevumuz.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ef22db4e---mamabofaworeroxelub.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae712e78e75---15986371416.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/11328848133.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/87626865312.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/maduk.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/f6ma0lkiuodea0l55cne224tbm/3469750530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 5172 bytes
SHA-256: ee269bfb2434ec71024ea8359d006bfbb32e4e8cf96735502699c80bbbc3b483

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