Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d97d744f542e33e…

MALICIOUS

PDF

88.7 KB Created: 2021-08-12 20:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e5c265bc576759428e1df396c03eb8f0 SHA-1: 7aa333ddb85d18595d9d5bd97da0427085cc116a SHA-256: 7d97d744f542e33e0d678d4a3312ec30fc9e64aac3f6e4ccb63b8e10c279be5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://aceonlinementors.com/userfiles/file/63051798380.pdf In PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/jawukunufununuf.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/15640382479.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/sisizukuwa.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/kinomofepivuxesusiv.pdfIn PDF document text
    • http://www.celso.org/download/penusidadoferunaluluzu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ol4de0kgfi4p33nlhq58u5g4j4/godeja.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/pesiv.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/uvqq1pfdslqm8me2k1g0rc4ik7/55645620703.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/93344853020.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/zekuvujukani.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e929872b620---3101665329.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/90589786246.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d39ce8eb58f---lakomezumerupesub.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/782265330.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/ravanizojimivepatege.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/tomisewif.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sidutuvifajupubopudopaxof.pdfIn PDF document text
    • http://www.sanruou.com/app/webroot/uploads/files/vevizewegonawa.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/zodudarerol.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/vozekedunimotoxo.pdfIn PDF document text
    • http://kag.fr/userfiles/file/46640224668.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/13753967609.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/dofilejulilumekupepoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+queen+mab+symbolize+in+romeo+and+julietPDF 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_off0000f78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78A 11196 bytes
SHA-256: c343030353d06bfd37c141c7718efe35b23b2d3f293e7c992028312eb209b658
font_01_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12967 17044 bytes
SHA-256: 2303e44f77371c6ee464751133119307ef85166c159d47717712edc5d3382924

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