Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ede0de04b84fe3…

MALICIOUS

PDF

89.5 KB Created: 2021-07-16 17:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7fbb4f81a0803c536a7a282eb8720201 SHA-1: ce0d1dc80789bab5bf39a57e9ab7e28273e58815 SHA-256: 03ede0de04b84fe3b749386bda74769143cbe50802066eaf2e94ef7967ba4949
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pensiuneavalentina.ro/app/webroot/file/juxirinedotaxojeze.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b9258f03---fanaturiroxavozaki.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160944b69bda5a---suloniguravagorusumomit.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/64286114a1192f49480e48877945febf/nepawedirujabe.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a47fb51a5c2bc33773c1f5c83b9b116c/70537251139.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc9f04eed0---37883241876.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d61314df3ae---39787286969.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d6e17e492---jawir.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/dotepomup.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b303cd169d7---81444463615.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/36206598300.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/nibojimewode.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/mifewetejilu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c863d0d8e40---pulumiz.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851c01a9726---62960566156.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81dc0bd6ef---juwaxulesuridev.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b752ce12---zowim.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab97eb3743---vidugulotijeginurofo.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/o2cu1pci6ia9n990lcvsugg82p/41614874416.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a4a152ce06bc3b5c071759f0c9807850/pozojo.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/bugifowinosurukusepum.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/o77tmg1jvncekf250lqfnaot94/dedigugumadixosofupodok.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160719e7c6e440---fukakenamogisuvizajos.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df8deb8266---31319781247.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608590b7ca009---64541990442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=factoring+trinomials+by+groupingPDF 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_off0000f72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 17732 bytes
SHA-256: f7eef592dfdc812fd7d3d8488bbc61e5eade1129744f2d5f6e1ae077f94e5df7
font_01_sfnt_off00012587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12587 10916 bytes
SHA-256: 2ee77a64e38823277366d8b16efbfc87b1882584bdebb0303b32cd22a10cd386
font_02_sfnt_off00013e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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