Malicious PDF — malware analysis report

Static analysis result for SHA-256 8007c74ab6a9704e…

MALICIOUS

PDF

88.7 KB Created: 2021-07-30 10:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e8ee68c0a1f18941fd7bc9d36187f3fb SHA-1: c13c0056f6c2943d2ea8324802957fb715d3d36d SHA-256: 8007c74ab6a9704ebd706acbb08124f809e25f19c097a52d92b1cadb8180f7a3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, likely as a phishing or malware distribution vector. No scripts were extracted, but the structure and URL analysis strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7aa715eaf---12702820453.pdf In PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/32574486144.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/gufuzokufinagadasozujuz.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/f7065632408f4f7a027db251e58f552a/jumirokubuzigibutal.pdfIn PDF document text
    • http://93564497.com/userfiles/lexujekabi.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/2747odgfp5cqjbmp9bciurv3ph/48352384283.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/rodutibaretakemoneveve.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/49644593978.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/75d5b4dea3845c6f304ba6cdb5e29ff9/2835211288.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/zejavagaranijopifewefu.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/768ca9f8f3d2f29ff72e9f17c44d1817/37484408775.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7204489b8---98832962427.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/72913897470.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bc43155da8a---setobumiriwino.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/0ddc49eabd3680b73cac1845767ded4a/46699115994.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/81025915068.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089b55411ec1---71441342041.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/bojaxuvavulurifulagekan.pdfIn PDF document text
    • http://3will.org/soubory/files/56302224867.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/nupirusig.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/93f55647243949976fbb4694af964562/92911260219.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/cdcise2f8evccnr6bj174v8mnu/lorigobobesagatubitatavi.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f1371f892---23404590049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+many+business+closed+due+to+covid+19+in+malaysiaPDF 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_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 11148 bytes
SHA-256: b1fe6985367fc5ef3f69a0dacf6b1fb2cc1f691291bba120f229f8a0ea30e663
font_01_sfnt_off00010cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 17420 bytes
SHA-256: 147b9054bf0d107ecf91ae9751edaf8cd73bc4235de9a2ac0a80599dfbb0bf06
font_02_sfnt_off00013aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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