Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c086a9dfc4c569…

MALICIOUS

PDF

97.1 KB Created: 2021-09-11 22:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aa84c16d97594d49019b73723f8f6530 SHA-1: aefccf109160800ffe05907d2ef8204135c5b617 SHA-256: 95c086a9dfc4c56938621035102f0ac823c5294fe80f741ec2fbea267b2bbd3b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised and disposable domains, suggesting an attempt to lure users to malicious websites. While no scripts were explicitly extracted, the nature of the links and the detection suggests potential for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://aweibel.com/Photo/file/nalabajen.pdf In PDF document text
    • http://01host.ru/userfiles/files/29903740767.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/xutazamixej.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613961e442251---tuvapatavakigod.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/55335644855.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/44256862969.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/kexuwazusud.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137108e6d507---71459745605.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/waferenafirugunubilo.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/15640811233.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/56187834131.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/femupomutegorun.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/21384854884.pdfIn PDF document text
    • http://biosite.ru/images/news/file/vomipavawipilixumat.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/wefevenawatubozipizi.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/lisuru.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/sevawenagujutotevutem.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/40964828612.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/naduwelijubi.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161359a9b70cc6---dobud.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/84ui44amuem9iodtq9ddko2tl6/6440867255.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/rupatumosel.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/vigunofapukanewadiwin.pdfIn PDF document text
    • http://odnoklassniki-files.ru/images/uploads/files/fugubejevamosumotimujol.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/31871795945.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=amazon+alexa+app+download+freePDF 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_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 19468 bytes
SHA-256: cdcbed0a5aa1ad577fb525ccf2ce34c181832588ebb945c0317186f56893c3f1
font_01_sfnt_off000146bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BD 10532 bytes
SHA-256: 898aa3dec58d232bf4644a50fdd0a70b08525667ef726727da5c9ac78192a056
font_02_sfnt_off00015ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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