Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9732895f73c9fd…

MALICIOUS

PDF

68.5 KB Created: 2021-10-01 14:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 31e4a86b9114e68eeffbe0b3f8d8ab6c SHA-1: 7b9648918d80f34982d2b99a5ffc52fd871ca5d0 SHA-256: 8d9732895f73c9fd4c38b7c42821f557b9b5910ab1c4095b3c53e3d80e48f7ee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an embedded JavaScript stream and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure and content indicate it's designed to deceive users into clicking these links, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=best+free+porn+games+2021 PDF link annotation
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/1829985299.pdfIn PDF document text
    • http://022-web.cn/uploadfile/file/20210926062942093.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/dagexaxu.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/rabopunogukizijomevabif.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/lisaragike.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/vokore.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/tipelawajajoroxodamitaben.pdfIn PDF document text
    • http://artediapharma.com/upload/files/18157067522.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/278403037.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/99157888105.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/xulanetizu.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/kelezizazadabokeb.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613261b9126df---85310774800.pdfIn PDF document text
    • https://phuquiland.com/upload/files/49845577320.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/kijerixafofebesodosaxew.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/i6v0dgemovuv7j6cpd33mhm4i7/vibegijubivesososujijifa.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/wunezajivirure.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/87255432262.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/97278548403.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/46801213575.pdfIn PDF document text
    • https://ibericadearmerias.com/file/soxekemidoxixaxivok.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec9809b886---jufizepi.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/5952254771.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/luridusimegizugo.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_off0000ad93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AA 10908 bytes
SHA-256: 4c1d9cdbb0d6f4da5c7252c6b2417a67e1a9e23af796cc85f44736348c4e5b18
font_02_sfnt_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 14328 bytes
SHA-256: f2205ac09ae53166a0bf6c51cbe63a991999b7f79d52c2d54bbbc18411cb2bfd

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