Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bb384a6a126494…

MALICIOUS

PDF

95.1 KB Created: 2021-09-04 22:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 41e2935a55c96455239f25f48d62449b SHA-1: 7d9d14bcc847da50bf9729b8f0983e8d311fa1bd SHA-256: 59bb384a6a126494b847d8b34a2119d754c25aae861b977d706e937222f73ecf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites and are structured as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The presence of multiple compromised CMS upload links suggests a pattern of hosting malicious files on vulnerable web servers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/05835348fa39cdfe3d8e2193d5710ff4/46479460549.pdf In PDF document text
    • http://chiangmai-esc.net/user_img/files/gonalidos.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16111d1925a00f---pukovulabe.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/jiginewesigisugosoris.pdfIn PDF document text
    • https://fond.ru/userfiles/file/lizusikeferilerivewilit.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/kitufumavedobupemom.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec755bc2e9---10155751001.pdfIn PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/sepajofajege.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210803_D527D360B6A3FF5E.pdfIn PDF document text
    • http://firegallery.ru/img/upload/3165601765.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/wafurozezoxulatutafuxix.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/guveki.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/53435339651.pdfIn PDF document text
    • http://vtaky.sk/media/file/jejaxepom.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160993cb6c4485---gegozujofidisadawe.pdfIn PDF document text
    • https://faprosid.com/file/30587735990.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/zatetimeloxitotera.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/napekepotedenibuxojetupas.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4500c204f4---pemamuvirisonojigum.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/roruwibusigaxidunureb.pdfIn PDF document text
    • https://samowar.ch/upload/file/judofisuwilixozalule.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/73578857343.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aacf3daa14---sabomazamuvisaxixa.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c83c8efc87---kubifedaduxeba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=arrange+alphabetical+order+worksheetsPDF 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_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 11092 bytes
SHA-256: ab8e3673fc378f871ab4a18d355888c8bddba7a522b19bf9e2d1c7292cfd9bea
font_02_sfnt_off000141a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A7 17404 bytes
SHA-256: 7fce51d177ae22f2932a3ddb78ca574708ec6dd0b50adb09b81c04f71abcf1a8

Open this report in the interactive analyzer, or submit your own file for analysis.