Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e0669ab8b0dcff…

MALICIOUS

PDF

87.5 KB Created: 2021-09-01 20:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b1b08fac45560ac1364007a2c2aa0716 SHA-1: dd650d9bf3dfa727d853bd53a32fc1753ef98793 SHA-256: 90e0669ab8b0dcff4a0b13088f04d5100f89e32c2a7f25747c4944bd90baf467
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://leguido.net/files/jezapafunapafofedez.pdf In PDF document text
    • https://driftwoodcc.com/userfiles/files/buzuvu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b3b560078---69608311330.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/tijijalu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087d96490327---bumovowa.pdfIn PDF document text
    • http://praguetransfer.com/files/file/wivezapisifa.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/20756582882.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/27862726872.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/xadogejipajidu.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/ee79902bd3095bbecacc71772b78171d/zimuloruj.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/bce6a91b73a6e7a13b735c56f155f12c/58327954780.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f6ad4d733---70750423787.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/1ba2203f7d74bf852a3e984d5259cb9f/kesotulik.pdfIn PDF document text
    • https://scriptdd.com/_file/file/56340134595.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/bejusu.pdfIn PDF document text
    • http://medica-brno.com/files/kaziz.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/6cf366c770198365d2df565444fdeee8/24837242976.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/latitozi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074986e9ba0d---jegijufofifita.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/7114702742.pdfIn PDF document text
    • http://museeducuir.org/upload/files/boxikulasopowitigiz.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/bogot.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610d683045dfd---47268324461.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093416345119---zekenisen.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/fodezikeporivewuxofemud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=jobs+and+professions+vocabulary+pdfPDF 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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE9 10924 bytes
SHA-256: 8be4d74a5cb3e513a07f9150355d2e5298cc22b6bc01e0a94b1bee4c33a290ef
font_02_sfnt_off00011923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11923 20824 bytes
SHA-256: 91947fedf261d0c254059a61007abaaf1aa9c4ca5308df038d9806272512267a

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