Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a0e9c370436ca9…

MALICIOUS

PDF

81.5 KB Created: 2021-09-10 07:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aadb30199541a256dbe5924a514a8daa SHA-1: a884740e2287555d751901da8010e4149f758bc8 SHA-256: a0a0e9c370436ca9c88452f8184746e253eeba14acdf3141dcd37ba8eedd6ef6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one that explicitly mentions 'scan qr code'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure and embedded content suggest it is part of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://laborke.ru/uplcv?utm_term=scan+qr+code+with+pixel PDF link annotation
    • http://terremeraude.com/userfiles/file/36568011489.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/fifaneb.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/dumixisezaf.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/64975661648.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/rijuzovugokoboxafetadizo.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613750f6b774e---93367720448.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/defunufiparuvokuzazuvig.pdfIn PDF document text
    • http://hortherbpublisher.com/files/upfiles/file/zagakikexosi.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/xidugofokanafafun.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/3f0cc012a0fc70a526c3731789e27b4c/govufifajeredesoz.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/96733927023.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/kusipenofeminubus.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/19613285142.pdfIn PDF document text
    • https://begili.com/uploads/image/files/4482753992.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/bufepomurefepuzuti.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/goduta.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/zeregubefekekuz.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/tibimarejitigok.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/83195152908.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_off0000d845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 10852 bytes
SHA-256: 20363e2913f2b2f4d353a614de568101240fa0747e3210581c7ab62f5f24e81a
font_02_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 18224 bytes
SHA-256: 33ba4287e026b4f371c2660d19a5d0f464d67ce62dbebe5ca63ff0ad5f821d1a

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