Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5e2fc28a58ed7c…

MALICIOUS

PDF

62.7 KB Created: 2021-06-17 05:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c1f0609cd1c1ca861b5913d9f61c12a0 SHA-1: 9a448641815f4303fc554545f50910fed46e8a32 SHA-256: 9c5e2fc28a58ed7cf42ca70f0dfa85d24a6e6eaf4549ea16c85ae4ad3ee66a4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick the user into downloading a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8575

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=download+snk+season+3 PDF link annotation
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/495500060be8a168e6961771e7ec9157/29551656404.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/5279c3c57645cb13c74a5b7ac395c104/sirotuxipezovunebofe.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/pafisaduruzegepinapuk.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/12988146656.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/39299c03f28b30201a2837092226bfa0/40492953583.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/mogofubufilizela.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/70268023982.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/85008021093.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/35339512646.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/57942226756.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad414288b8d---71677033373.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce19e04fda---tesazof.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106170230178381.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3bb1efc22---68344389431.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0e093304672f1b8456ded1faaea56a41/doxosizakaguwalevevaxo.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/dujinapufiwuta.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/dulejezekupajusizitup.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 4120 bytes
SHA-256: 4bc9a9987a5029bc3f5017768e9bff17968a27b5842a01053f372f97f3118e91

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