Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ece7215ee940fc…

MALICIOUS

PDF

78.6 KB Created: 2021-06-29 10:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 537983773f524ff4f19bfc837d6cac27 SHA-1: 13799492157a0d194e4ffad38e12ce272351d2b4 SHA-256: 07ece7215ee940fc436742f97c6b38eed30ec9bdeab45f423da5a0d2da1242cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links hosted on compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted, and the document body was unreadable, but the presence of compromised CMS upload links strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dfb9b864f---67374063269.pdf In PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/c7e9f698e6abbb2e0cc8cd9b5b37b1f0/remijogalujelu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8fab82ecfc86d2a574aca2f3600f6223/fomixefalegixezug.pdfIn PDF document text
    • http://islandpointfl.com/userimages/xuzujepiwaduvimisemin.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/66903016339.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/30269757149.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/994d4d9f6942b1af60393852782c4561/tedoj.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b79707b19b8---17624949693.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/b9d172a8717fcd2df2a247e6e01af0c9/52019158876.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/72403d822481c1c0a9e17278ba56f66f/jexemixorunusomowatin.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/c16bf55094b0fd8bb27148a4e385b9b1/91295146645.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da7e8b1e55c---64710402849.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf3c62b228---27615062406.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/zijeteziwomuxomemufira.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082524236e5a---63374035158.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/fed0ec63e7739ddb0013376f87cadccd/19007814413.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8c813de9634ea796f8a461524d102bf5/77233217048.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9aefb7bd01122364b87d337af44b56e8/95826613468.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/pme1lf060ab1lptmg9i2hu4v28/jiwokudo.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/f24eaa213c4513fdbe9747784477437d/27489286828.pdfIn PDF document text
    • https://actorconseil.com/files/file/funavem.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/75888085276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=familystrokes+brother+sisterPDF link annotation
    • 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_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 10592 bytes
SHA-256: 30d4179e96918e4c626ab70879e04d7e5866126fb5128709a738931857eb0791
font_01_sfnt_off0000eb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001036d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 16252 bytes
SHA-256: df0e78dcb98863a5c10e9e71147074b6e6f440926a4eef9d158ec680a7be4c98

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