Malicious PDF — malware analysis report

Static analysis result for SHA-256 e091af3615519d61…

MALICIOUS

PDF

70.7 KB Created: 2021-10-02 14:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7e2df437cf8705d47a45e7ca385448df SHA-1: 3e47183af6dbaa32c3edd669305d8e5bcd2a6c2c SHA-256: e091af3615519d615dea65d1bbd8b19cb90e2369c379c6787a980cd5f6adefda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://wastran.ru/uplcv?utm_term=hurry+the+hell+up PDF link annotation
    • http://autosoftware.company/autoresponders_images/files/98706282.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/53475586328.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/jabotuvipabugis.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/99240124538.pdfIn PDF document text
    • http://618tuan.com/uploadfile/file/11295546663.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/xuligari.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/zidoga.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/3485377984.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/dokaruwulebozokikaja.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16142553c69ec0---fosoxanewemo.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/88425548563.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4b9f913e94949cf6f3268d06b051deb5/dafejipe.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/5372104131.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a3c5b3f3edaf28179c7c3dc586de1c61/gozunix.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/67327792613.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1612f14a729b62---15463060982.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/putepifadomabezizekajuwod.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/titubetovesifolekiridaru.pdfIn PDF document text
    • https://ksboutlet.com/file/files/xazojelorenofinipapikapa.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/xigipovonorasefaluxer.pdfIn PDF document text
    • http://gdgom.com/upload/file/210928042335883442m9xwlb7as7sa.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89d8b58f49356a1f09ee0105f80f33a0/7663434927.pdfIn PDF document text
    • http://saint-party.com/media/file/musujunavulu.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_off0000b3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A3 17024 bytes
SHA-256: b76add66959aee34da7d67edadb459d0c86159deefadaad0a6c68371e4c6765c
font_01_sfnt_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 9908 bytes
SHA-256: b8d064d8697f0868c527f6442a36157639966dfec66cac94c61905dce0eb90a3

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