Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffaab96caddc679…

MALICIOUS

PDF

69.2 KB Created: 2021-09-15 11:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 66bda91cf664da401327d8336eb3a1d2 SHA-1: c190c717bf6161f249d9ad2acdcb5c95b653db2f SHA-256: 6ffaab96caddc6793351ffe991f57f9f251da6d9b2ecd3aa73d98fdea740ebb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution disguised as a music download link. No scripts were extracted, and the document body was unreadable, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 http://wo-kop.pl/userfiles/file/wojovoguzidagese.pdf In PDF document text
    • https://e-ceramika.pl/userfiles/file/2785704179.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/kekeruvulazobemalin.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/tafuluvum.pdfIn PDF document text
    • https://wyslijpaczki.pl/app/webroot/files/userfiles/file/37969274636.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/32659458562.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/gofifoxewatisepidari.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/tijunovobidabologax.pdfIn PDF document text
    • https://nepalfinepashmina.com/userfiles/file/jikapudaregobirokefe.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/wibulafofexujojat.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/36694783954.pdfIn PDF document text
    • https://fototipia.hu/files/files/kubinitopekokakileges.pdfIn PDF document text
    • http://446888.top/userfiles/file/vowuzotolavodeximol.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/pegefiguxawonetonunufaso.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/midozunajup.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/76363416678.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/59985560874.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8c3c9358f---42560970252.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614110f7a054d---51351535538.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/86703884305.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/58774886887.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/kubizu.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qpunrsv5r81qdorlumaichro33/natasazore.pdfIn PDF document text
    • http://aranysolyomfeszke.hu/editor_up/15164786440.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/vefekivaxopulefi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=6lack+type+beats+mp3+downloadPDF 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://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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 11156 bytes
SHA-256: 817d9c0d605e704b93f3b73e5facbd8076f72908fc3a473b39a6328e27f3348e
font_01_sfnt_off0000c9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DE 14684 bytes
SHA-256: 47c672a442f73071cfe5ddc91ea7e79954b6b82f1743a12be49ad90995fecc53
font_02_sfnt_off0000eecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1