Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3f4c7dde4cc7d4…

MALICIOUS

PDF

79.8 KB Created: 2021-07-01 16:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ce76cab33ef6af60b68ca535105b5b70 SHA-1: 5bc24a83feaf81ab8cc1b45ac7feb6a31b55e2f5 SHA-256: 5b3f4c7dde4cc7d426972ef2c5215177a1b1e24bb20da821ca23a2cf6e2cdfd7
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing and remote support lure. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a remote-support tool lure indicates the attacker's intent to gain unauthorized access to the victim's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://huntic.ru/uplcv?utm_term=quantitative+chemical+analysis+10th+edition+solutions PDF link annotation
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a66bcaa1a---14377399282.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aeec0933a1d---pegodiretokorimivok.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/49eb48a7c02c03865778fe03ec55146b/jepunokufo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/43b0bf03d5c570f6fd081d1cc738ff13/wegixefedakewomeluz.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/7236ea8c4f8fbb3779b07a96e84a99d9/5889039818.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/3k9dntaot19ramgk2vlj3u33me/nenilusuzugex.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f997a060cd890ffdb53a3b06ac326caf/mesuperi.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967c027032a---laxoxudarorititafawibebo.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/mupejawiv.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/22986365868.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/guridebulejazix.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/didubutafuz.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/368ead0cb6fe44e1d302eb67fd931f65/pupavugozoraripune.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/todekigemuperuramaka.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/kuwitupewunaxosowezuso.pdfIn PDF document text
    • http://fedoro.ru/upload/file/65817078895.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917f5673ef3---76896417849.pdfIn PDF document text
    • http://c-amc.com/upload/files/jigovek.pdfIn PDF document text
    • http://jaatkinson.com/userimages/ripepavuzogideforapele.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d124ed9f5f---vamijezinevejewobov.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_off0000d6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A4 11048 bytes
SHA-256: 530b9fc125489f9cb9b7f9ccfb39de97046d1e4e83c293410078f4f6aa663ba5
font_01_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 16204 bytes
SHA-256: b6463b3c8572042fe1945fcf195fdc37f7cfc40322738ceee8abb0aa91b1ce78
font_02_sfnt_off000119ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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