Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce7fead50ce5e5a…

MALICIOUS

PDF

89.5 KB Created: 2021-09-08 02:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 447b0f2853a13208125be298eb2b1144 SHA-1: 05107047b51764b2ac88ed838bb292d701ff2b4c SHA-256: cce7fead50ce5e5a183ee3837724c7dafa436922fe768307a90048e6576ecb60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains a link farm with numerous URLs pointing to potentially compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of embedded URLs and the overall structure indicate a malicious intent to redirect users to external, untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://pixomot.ru/uplcv?utm_term=herramientas+manuales+de+corte+ejemplos PDF link annotation
    • http://kythuatviet.vn/uploads/userfiles/file/52949090199.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdfeae70a83---52776588934.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611815d99ba85---bemid.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-2/20210502020547579542.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d9ad6f255---ginimizuxivob.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607285afe3ebd---kediriwudifiwivasedixet.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/omr0b4v27vqauad4s288eqo5t6/74797419148.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/fulimojofeku.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/9503470001.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bc033a0a8ce---tedemaxaj.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/23984501800.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/doxuma.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/7dbfa5534d51bd9504b1967116f508f7/vikulirosegubuz.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wedanedalumafune.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/ec6cebb1b94097f3c3590be950c4f933/mawetadev.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/xosunukugedababuviked.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/21585535289.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/12300092737.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bcad71e0f---51577266588.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/zofofogosap.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/43d930a0727e98c189ad969b56118ac8/jiniganumatot.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-3/20210603130441593742.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611ffe6790457---wofunexet.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb81466d7b---13404562565.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_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 18776 bytes
SHA-256: e9797c91f4f790c0e6ce7893b8ce6b349447a705f82e996b8f24a6ef2133ffc1
font_01_sfnt_off000125bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BC 10896 bytes
SHA-256: 40f034e9849d11e8e01a2e4d2a76c68e48c4feaf44e42fff5719902bdc8d53b9
font_02_sfnt_off00013ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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