Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e34469028af4c87…

MALICIOUS

PDF

76.2 KB Created: 2021-09-03 15:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8dff35b436d51fbd74643245222344d9 SHA-1: b768f2e9b912013e161c16d48e154f7307e3579b SHA-256: 6e34469028af4c87e5fcb30ba8edfedd669945d5523a54fb4c3a4ba39f778990
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is often used to download and execute additional payloads. The file also includes numerous links to external websites, some of which are hosted on compromised CMS platforms, suggesting a phishing or content-luring attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fillaracingacademy.cz/ckfinder/userfiles/files/wifawovi.pdf In PDF document text
    • https://mobilaide.com/upload/editor/file/fukezuw.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/a78552f5f0d76d7eb24830ee42731f0a/29571230881.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/bavasesunarujagaginalijo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf47e998c4---womofizaw.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/degerikogutawatukogaj.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf2bba0c2f---755782378.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/gevari.pdfIn PDF document text
    • http://vertinu.lt/ckfinder/userfiles/files/61565637344.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c675d907548---suxutoros.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/fuval.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/72912198387.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/90954895655.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/tiguvisegemur.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/31910578354.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-22/20210522150059475231.pdfIn PDF document text
    • https://invest.pl/userfiles/file/tudin.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/xozovatavu.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/vivakejudebevu.pdfIn PDF document text
    • http://zivotzaokny.eu/res/file/86368967537.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2020.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/79951249461.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/26619760402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=paradigms+of+artificial+intelligence+programming+pdf+downloadPDF 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_off0000c4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FA 11048 bytes
SHA-256: 05dd037021fc8c07547b8e8b02259cf494dc93097d9a258b782e8efc08092dfb
font_01_sfnt_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 16996 bytes
SHA-256: 86f3faa4da99e82938aa738293b0e9b5e7ad6007c4b25435e8b7a5af566f3e8c
font_02_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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