Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3c7945010f67a0…

MALICIOUS

PDF

70.2 KB Created: 2021-09-16 22:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2cfef803e2dbb7cbfc8329311cb0edd6 SHA-1: 0647890a1b851255442820f0ee34a2f8dd53bd56 SHA-256: 0e3c7945010f67a08c4fc67b00550656e6dec848dfccf11822caa82425733ca7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms 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 external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://hbisan.com/userfiles/file/kerasaf.pdf In PDF document text
    • https://dcicz.org/userfiles/file/29982264291.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/fixoziwanezokof.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b58e2dd2e1---85525012850.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/31923528993.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/ripegirupujumu.pdfIn PDF document text
    • http://duplisite.com/userfiles/file/wegugototelowegobivob.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/31384169020.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/54456630769.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/500798243.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161426d22d103d---nanozexusetodumiramunexo.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/n1d38c19nc2ececvnhbktm6bao/67750501853.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/vaxeje.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feeae578fc---natasufonirawenizesaju.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/bepuwizonilorawu.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/vovelofegisavikuviraxad.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/68681396095.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/5631750403.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/64432199494.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/73346990088.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161427bf5853bc---rugisodelapexigu.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/79183526950.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/07/livofevezusutejebuxusewuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=apps+to+watch+anime+movies+for+freePDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/53640061629.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_off0000b33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB53 10832 bytes
SHA-256: 3d4bb6c8f40bfbf8c2e4153cb37c6730661a88f662b88cf7a16647dc6ebbe68f
font_02_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 15400 bytes
SHA-256: 205cd23ee1ce605b1b0f6f73f39584ffd8791e48509da2711f79beb76a9db940

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