Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fca1e90a777c6e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 14:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1feb64839f88d4bf3b4a6d27e7471ce7 SHA-1: 5e837985a61fde8f438bd238a52376f01ec2af17 SHA-256: 02fca1e90a777c6e6578e05c79b443162166c6fcde59f3ccd15815be300df094
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • 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://cathyourhair.nl/js/ckfinder/userfiles/files/sovakiluraniwu.pdf In PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/d7e59df3835a424187e331477bed6660/98139718623.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/83289423855.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e14cc6ecebff60e4be1d244e60b3cdde/gijurinolibojut.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/senovuvi.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/96952759887.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/jaforinofolafinuzowur.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/24443549025.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f5b197562bfebf4fcc2d2c8b695b2095/pejen.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/50345643099.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6586984223.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fa957ece---kilukuro.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/58504214790.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/71386361003.pdfIn PDF document text
    • http://grotech.in/userfiles/file/genexuvedaminalutebixux.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/mazufokexi.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/tuwivijewire.pdfIn PDF document text
    • http://maihome.hu/admin1/file/37542566665.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/nufur.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/13809300862.pdfIn PDF document text
    • http://steinemann-ag.ru/zodasuzixamuzaxavunudado.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/29672614658.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/wusuwepuzuvipevigefen.pdfIn PDF document text
    • http://tprcindia.com/ckeditor/ckfinder/userfiles/files/21920073987.pdfIn PDF document text
    • https://lhorizon.ca/uploadHorizon/file/zepulirotobelawujaxaguj.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210901150333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=death+incoming+game+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_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 17684 bytes
SHA-256: 9b7225ff3d67c704d77e1f101be2983331a23c40bc416785e7cccbafd7fb67de
font_01_sfnt_off00010add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADD 10636 bytes
SHA-256: e2b29e0c70e5512f0a0616c83ddd9deca3f8a218291fd573e60721309be4d466
font_02_sfnt_off000122d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1