Malicious PDF — malware analysis report

Static analysis result for SHA-256 9200cfe909f882e8…

MALICIOUS

PDF

95.8 KB Created: 2021-09-20 22:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7bd6d3a10d59001a555937bce56898df SHA-1: ebf227b54c296db03f6b022640981489d1d7a71c SHA-256: 9200cfe909f882e8f5163c425ea56711b3274d68dd6f28320eeb78e6f1b819f8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or session tokens by mimicking multi-factor authentication prompts. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://archism.ru/uplcv?utm_term=apple+to+android+music+converter PDF link annotation
    • https://walkandsmile.com/userfiles/file/nitesugemejulogeke.pdfIn PDF document text
    • http://1carl.com/userfiles/file/zowulirotogirijuwirisiz.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/fasagaruz.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/72008561051.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/9805299849.pdfIn PDF document text
    • http://tzsunup.com/upload/38901103889.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/jirow.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/ponibuvoritujoxunigaxuwi.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/fagujaxegisomikotafifub.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/58ee28b07475828578aa90b044b5ce44/sinowi.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/98439080748.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/63897759340.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/gilux.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/48615591542.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/kilon.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/8ff12a76351564ef39fe54b2a9291dd3/21239288718.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/4214044419.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/517851958.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202196032505702.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0d5eb02e---ralidegopajigobufidiruxu.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/353ef2ae1537bfa61b9b554bb169cf4e/28007489069.pdfIn PDF document text
    • http://inspeq.eu/public/files/83406324050.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_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 17744 bytes
SHA-256: bc6626dad5d50e5b57d4c6f6f6e0e4aadc989f163c0eb13bf7640e2b476ecf9f
font_01_sfnt_off00013eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFF 10824 bytes
SHA-256: eb335c1a5440446e1d1121d8db4d0827d356f704ebe73168c7995bf3d7cb2ed1
font_02_sfnt_off000157fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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