Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc69e19c4560d6…

MALICIOUS

PDF

74.9 KB Created: 2021-08-27 22:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3e6a621022fe832fc6d7789b3e383be SHA-1: 0d7cee00660ac5a08c210c4362a5d3a4f58a2e29 SHA-256: 97cc69e19c4560d6340ac6fd2fa749d7c35a1f8efef633b71ce4a7e668c1c1a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://irlanc.ru/uplcv?utm_term=doll+face+calico+persian PDF link annotation
    • https://glycocalyx.nl/userfiles/image/file/vawinasurikaninarogaf.pdfIn PDF document text
    • https://abeess.com/userfiles/file/jewumorakozexan.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d6e953495---kivujikesiro.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/xisubetadomepojisifigaz.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/27006801237.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/h6dcn6v8500aciie5pklp13mqd/71001136477.pdfIn PDF document text
    • https://cape-electronics.com/media/file/48450405756.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/69358885220.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608974f54c23c---sugurivuxomememega.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a48eb6365bbea3086818571d4fa9fdc7/44098964257.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/tenum.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607035c4010eb---komawizaneb.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ba98194d341a2286fb5ac20afa5c2eb2/votol.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/wadozixigap.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/668555f7ed4cb3bd667bdbdbc2de3a5e/20259922788.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f31d01394a---fizujizipirifuni.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161057b474344c---80082185306.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f797773e94c---liponomudularewobim.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/5e472d10ff7efac2f141d033061d59b1/43368584535.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c640fae1d1---22651968270.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/kesevito.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/8f2e183e9655b89cac8ad19084de0cd9/54547179694.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/95086053333.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_off0000c3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AB 16336 bytes
SHA-256: e277aab861de029a5a32ceb4a2f34656fa9be6a2a382bb45e3fcf5279518f74c
font_01_sfnt_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 10376 bytes
SHA-256: f7a0a726e358e0a5e77979561f53e35d3a4736721ace572bd6896560009d1e9d
font_02_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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