Malicious PDF — malware analysis report

Static analysis result for SHA-256 073f37c86b07353e…

MALICIOUS

PDF

80.6 KB Created: 2021-09-13 08:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b775615e5990870401049ab31d49bb24 SHA-1: 5b82c399a0f3d68ffdf59e38cae31e9821b003a3 SHA-256: 073f37c86b07353e3746ea8f49aa9ce2c5cc89ca8172fda7cc7f7f8e905b0012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, including those hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://pixomot.ru/uplcv?utm_term=best+movies+online PDF link annotation
    • http://driver-jazda.pl/upload/file/67236903459.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/50712601940.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16139e5e29c9bb---10494680750.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/14510049752.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/rasikaja.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/batin.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9adf46348---78172481709.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/51729618202.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0b362cbd8---22631703769.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/tirawurotavuke.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/lokuxebozidewikojebe.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/lilexijasumetevebikubovi.pdfIn PDF document text
    • http://ecole.ru/text/images/file/japarudunofopevenunuk.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/zupinapajofixalopesi.pdfIn PDF document text
    • http://lgassociates.in/uploads/disip.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8acb0f40c---wumuxanizutusekabuvoze.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3efb629c02c7336f8c45f5e568fb6451/54757863277.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138cf29c6902---17094691523.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/63153059283.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/30935519901.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/96862644071.pdfIn PDF document text
    • 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_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 18604 bytes
SHA-256: 7e6d56fc296a980c7cafe1eab7c0551acabab646a8f19162ef905c5add402f73
font_01_sfnt_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 10128 bytes
SHA-256: a43151de9efd2daee3ebad010d9f9b939235afaa83b08b7b69a9e93f238421db
font_02_sfnt_off00011d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1