Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa93e6b4be159aca…

MALICIOUS

PDF

85.7 KB Created: 2021-09-14 10:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 30bdcd3d9ffa22325dc7d0141efd2c08 SHA-1: ec97b64f2891445724bbc2023732b8efe33a38c9 SHA-256: fa93e6b4be159acaa5cd733ffb8cff380178ff08b6eaa4953347ff9af89ea0f0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress sites and disposable hosting, with numerous embedded URLs. The document body is unreadable, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

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 https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316304842c2---kuvinidabedegabudizapowo.pdf In PDF document text
    • http://studiodrago.eu/userfiles/files/59240307861.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109111635046149.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/zozanumepulekefafopor.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/rotaxawutivorafewipug.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/menosonosamozuvileruzuvam.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/64315037504.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/jasobepodi.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7ce5cc154875e17e1e8fa76eacdccaf6/wasudigupugo.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/90697593996.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/84650795344.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/51657822206.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/80567327967.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/dosalovevasepewowefezi.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210901041337.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/livejozabugapiliwavagep.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05a4ab3f6---mipofafixu.pdfIn PDF document text
    • http://zeci.nl/im/image/livupogaxukewidud.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/42952769862.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/14811979459.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/80601095990.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/5a95987e4a2c36d657202895d032accf/dulurimojurufipigagavuza.pdfIn PDF document text
    • https://architektor.ru/uploads/file/19065465388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=android+app+bluetooth+receiverPDF 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_off0000e9b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B1 18056 bytes
SHA-256: 4cdada878b005a246944879182a5a6a54d6f4b8652ffc5e629099f8748561cd8
font_01_sfnt_off000118a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BB 10732 bytes
SHA-256: 33c3ac92b314bbbe40a02cacfabda277c941f373d1b13c704a6b615030ba2728

Open this report in the interactive analyzer, or submit your own file for analysis.