Malicious PDF — malware analysis report

Static analysis result for SHA-256 782045cda5d0be24…

MALICIOUS

PDF

83.5 KB Created: 2021-06-23 07:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 59fd8986be2f099efda3fd6c5ebf9f8c SHA-1: cdeca053a02b7dacc31eb9b50898a450e4526d46 SHA-256: 782045cda5d0be241ffe0840571441b338e5c0be5f1b8440d8874e954ec0184d
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also includes numerous links to external websites, some of which are hosted on compromised CMS platforms, suggesting an attempt to distribute further malware or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://aslimitada.com/userfiles/file/82954632894.pdf In PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e401cdee91---vuzizomud.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/f878b03cf086008783bd8da17fa85699/mexemenixupikuzuwik.pdfIn PDF document text
    • http://4bx.pl/public/file/siwirelafiw.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c361dc4157a0ea0d98f0d205d07cca3b/88468287367.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/reditanokatewodupu.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/86673910913.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/xafoniwejobiworezobituve.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/92603487571.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d04875ed8---3419450471.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/qhsj0trejrgm7014vi97ub25b1/18771830306.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/5482f520a6b2fb989bb7f00eae65edaf/96042277055.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a608049ffe3adb6c3281bb2356a8e6f8/mikogif.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78d8c6a5b---69086710658.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/xojifekosulodidobopot.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/85a72742eba1d6682b4ce593454bd38c/45888016793.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/zadositi.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac469a1fcb4---jubulupel.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210618_F9AA0778BDB41D15.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/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=acer+aspire+5670+service+manualPDF 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_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 5628 bytes
SHA-256: 122b87822e6f51a19429eac0fb226df6a330ca9cdb1eac5383feae34821bc15e
font_01_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 11216 bytes
SHA-256: 15e11e361c0eca67d7ad18d5d42631127ef30973d88e2e298e27f55391e168e0

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