Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc75fda121387224…

MALICIOUS

PDF

105.1 KB Created: 2021-09-04 04:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98c06862f1d60a30ec8c35c0070ae70a SHA-1: b4597d1ee7499a6ac1931a782dbecc8e12684bef SHA-256: cc75fda121387224665643e18c8e1e27c23921ad8c647c03f2abf77ff312d0d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing users to various websites, some of which are hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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://baobianhkhang.com/upload/files/90974479905.pdf In PDF document text
    • https://aymfly.com/aym_image/files/xowadazotewonijobef.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/52e1231c8f9b10a9e3102b4f5d3c9d2c/pakukitefibunod.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d42367459343d5c31198b4154feb82e7/82223663858.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/60992570051.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/04f1aab6dc9f2e96c798ab97f54c882a/zaxixin.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8ef9aff6f---wapefegez.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/jigigo.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/05245d0e2e7670d7ce6cfc33b39b469c/zadijutasoweguziwov.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16071661e05af0---gudofukika.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/gogixusewuxak.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/85fee1995a5be61db2892b19a928c55a/bebixadokirozakelinogetew.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/futewawoveziwumafumeko.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7c42b061bd3a0359d201822d5037536d/varojixezanifoxisuxoxige.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/jilejojisiretoverig.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/matoxukis.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/i4mvgpg5668i3qh0o08f1nr0ui/76287972520.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/novewix.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/zopegadibuguxatabod.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6ad653bb7f2c4b73fd3110d61cde48e2/kupubojamex.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/95313960216.pdfIn PDF document text
    • https://chptravel.ir/data/file/81355886304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=limbic+system+physiology+pdfPDF 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_off000131d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000149e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E7 10912 bytes
SHA-256: 44718e5f0fc1b6427d0089e5b279609454d9ac2ba620446810f3292bc0ddbdb2
font_02_sfnt_off000162c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C7 20332 bytes
SHA-256: 83228bec205f723deaf6786502639736c91c80ec48077ceb7ed8b6fbd8bb7c26

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