Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e14fd80e07ada5…

MALICIOUS

PDF

73.2 KB Created: 2021-09-14 08:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49a27298ae576a8413b5d6865102f66f SHA-1: e07a37d9d34ab2d29e6f414969364fc6375fdeae SHA-256: f3e14fd80e07ada5272d098bc0423c7fa39629726d5cf3b2ad771c497a81824b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the PDF is part of a link farm, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://preciz.com/uploads/wysiwyg/files/16559601225.pdf In PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/gekiponotejokexegilixojub.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/42547977742.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/puwufusajef.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/31595084634.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/58028949838.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/76015297716.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/22952280305.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/81848853821.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/47842122813.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/52209542066.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/59825953801.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/xixegoxowu.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/48468561095.pdfIn PDF document text
    • http://villkasz.hu/editor_up/58852731615.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210903103005.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5ecacf76c---vanugasebenepe.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/52710188743.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/97335603232.pdfIn PDF document text
    • http://lulanjina.net/upload/files/pitijamubi.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/15187962000.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/18653910974.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/luzukerilubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=latitude+lines+parallelPDF 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_off0000bc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3D 16908 bytes
SHA-256: 55c2e74af52338c96d3b57d8868332dc59666a4fabac655f21e18bf013d0ee8a
font_01_sfnt_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 10324 bytes
SHA-256: cd50500e3576c686893c41e1a943065fc93fba2e1478029cd689bd55cbeda60a

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