Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ab7c864409b54b…

MALICIOUS

PDF

85.4 KB Created: 2021-09-06 17:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 43f30882524faeee98b2c3be9388998a SHA-1: 4985631ba072ef5b1a216f6e3531e3f41adf7fc4 SHA-256: 02ab7c864409b54b79543d30dba90da0f15f10cd6e228a8c09a443381cc0e4fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users. The document also contains numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to obscure malicious destinations. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://files.ibiza-ferien.de/file/lonajitofekimopatazizo.pdf In PDF document text
    • http://compufoxmail.com/userfiles/file/11738101237.pdfIn PDF document text
    • http://89928386.com/uploads//files/202108070620188903.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/81849439010.pdfIn PDF document text
    • https://baongochoa.com/upload/file/33147180913.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/57082144472.pdfIn PDF document text
    • http://gfhs1978reunion.com/clients/56625/File/80107469749.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/nupafuvamon.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/puvizujejon.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/wunalobavojunuvukatu.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160726747e383b---8334201627.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/96575811787.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/bapagisas.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/47026810464.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/a2202a53195750e0b775ae6b627077c3/rukifovijijolaf.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160834c72b70a4---ponulofujopugosuxibosuvok.pdfIn PDF document text
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/gufigolopegipositaguzu.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/6767657460.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f28d569d8---nujapagifivafukifeponu.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/77780438803.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/83788060594.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160881e49a14ef---tusixuvexalenobavufosa.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dedb13c66616fec9b4688e186bdee678/ponatidogefibudofasi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa55bdb054b---93126534212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=programacion+en+ruby+desde+cero+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_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 11172 bytes
SHA-256: 634cf3a57391e6b5859dc6b16d818a237ee811e07e10fa005f927a92646954d9
font_02_sfnt_off00011984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11984 18028 bytes
SHA-256: 61006ad70fa1987243c6799185ffd674c7b2ff76ba584bd43b85523a43166502

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