Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d5be22f499503e…

MALICIOUS

PDF

81.4 KB Created: 2021-06-24 13:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 895a524dc2d042022ce5afc44bc02b01 SHA-1: 9f6d85d6755148de13e40309c12d35fc8a791e9a SHA-256: 64d5be22f499503eaa7d6e79a491b60cb74f7c86a7ff78847ef89174938b5ae1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for 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 0.9998

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 https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97e39f0394---28178789174.pdf In PDF document text
    • http://findmecakes.com/userfiles/files/zidoludulozajibibusul.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/477630e6116dd2a09b66783df88fbc70/miwewug.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cf97197d7---kivope.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-23/20210623040805721463.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0acb92116---radupuku.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/b384a0ec3272dcacda4d2194b3a04066/pivujawogudifagovemiwok.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160833bf2eef07---89423427911.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a241209d2c3---3189988959.pdfIn PDF document text
    • https://maisonforville.be/documents/file/papiwutasafop.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/32fcb9a9e2f754c8ea5e844e19013643/rotugewir.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/ranasasunedatojubi.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/bad228378456b9996d9f43cddf95a12a/wuwuvetutajiri.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e7f304c78888e83c074cdce7edc587b8/67652597331.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/tenozab.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/m4ngefcavc1sm9feg3vlmshv81/44886768307.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/mccshnr8nev89ica4e1snf1jhg/jibavazelunovoxefexexuju.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/34b8148fd13282b42ed66d736f9d22dc/zipuradegavasitigu.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/jovepabadivusoridagunexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=point+break+full+movie+online+watchPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 5300 bytes
SHA-256: 008a0979f5d22623ea94bf459c9f7fe401c0f13da17e22e53dcc210e587ca38a
font_01_sfnt_off0001123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 11104 bytes
SHA-256: 423e10c9a609d8ebbb3a3dd483b9a94dd4da3f490b50d687b59735909f82b5a2