Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab08e8f976a3b56…

MALICIOUS

PDF

79.1 KB Created: 2021-09-12 07:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f2c13643aaa41061c6c0458ed508f34d SHA-1: 9d4a32f1063964fecb5e4064b33398c9637dc82a SHA-256: 9ab08e8f976a3b565aa561de350fcf163731be87d22487ae1fa9b3125f21609e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics indicate the presence of embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious content or download further payloads. The document body is heavily obfuscated, preventing a clear understanding of its direct user-facing purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • 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://b2bircruise.travflex.com/bot/ckfinder/uf/files/kenenixutawadonepilofe.pdf In PDF document text
    • http://abwessex.com/uploads/files/labajolozaxivusugu.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/xemotarederi.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/92224406338.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/oqi7hk295a5oqpec54vqbinvfa/kefifukexiva.pdfIn PDF document text
    • http://lejuriste.ru/files/file/4059984614.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/15921380096.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/xadezebeguzafujabudik.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/zubafepurazatajevituta.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/kilakuzimomasaluma.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///sekerokunopibebivitiw.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/gokin.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1ac191137---75825234388.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/37838622542.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/vokisogamo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/14358166442.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/zalobetopisami.pdfIn PDF document text
    • http://irinabailey.com/upload/files/60106631229.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/62244109316.pdfIn PDF document text
    • http://geotersrl.it/file/5821547265.pdfIn PDF document text
    • https://nasikampung.info/contents/files/67415298398.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b15aee9a5a---gitasebilunedow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=move+videos+from+android+to+pcPDF 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_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 17276 bytes
SHA-256: 736935516cae8920b4b8a5350f6794908e4091470643d0ac9942f20498df7de4
font_02_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 10792 bytes
SHA-256: f94ea99363e5281f9f968dd774dde8c80115102d937b199122a85adae83c7329

Open this report in the interactive analyzer, or submit your own file for analysis.