Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe43997fc98170c3…

MALICIOUS

PDF

85.4 KB Created: 2021-09-07 20:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e72b03849083b11b67a97ed8a0d6ba40 SHA-1: 2b45828253df45bc6a19a385ca8c58f8e3ccc7e3 SHA-256: fe43997fc98170c3f6967505ba8013a9ae705ca97037e6265e03453c9924ef25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://garglob.ru/uplcv?utm_term=wiser+heat+user+manual PDF link annotation
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607251135611a---taretosefidixidoxelilet.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/56234105460.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/38878249707.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/356da64b7432e90690138419ef8ee7ab/fukudate.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2264e69409---44615298064.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/9rmmov0emd5vamk7rsdaqv5ng4/weduguje.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/xesusosodiduvi.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/bunedip.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/4onn5u9iqhkgqvi4lhe1ulk4hu/14202926299.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/51006848094.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/tukarezez.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/bunurojifelinilegeji.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/rokatevu.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ac730593a8---74702565311.pdfIn PDF document text
    • http://texmet.pl/userimages/file/xijelarunepinol.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16104237665166---jisufasig.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/bad189898d8a1837bca3ac66dd62e605/37065780879.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f8695d3daa5---gebelajajadixizedelopiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/862992f58935de6e4b30bb406ad63cfc/zeveretopefenomiberepido.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/misumilameni.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/64242772265.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/susubafijabomelomoxa.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f05bd9dcc9---91235736921.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/tijifo.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/gebawagimuwigudelaj.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/jilutiwasebasedodubatuj.pdfIn PDF document text
    • 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_off0000ea05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA05 10348 bytes
SHA-256: 21934abc5f74a8b66a7e7f0eb4b82a058ba87c3955da280a7354db51b3aff95d
font_01_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 17888 bytes
SHA-256: 8f163d7d29a52b62d4f3b47ed3e05915644b3372401a13a155d24e1005005612
font_02_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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