Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9e4df7c3c94be2…

MALICIOUS

PDF

84.8 KB Created: 2021-07-06 09:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a55d83d77081878b8da11d0cd2541fa SHA-1: cb3978a473f1e1268e6585eae77185aaefd02876 SHA-256: cc9e4df7c3c94be2458bc0f66e4dbbb4c294ff2e54eec02a7b3a659626ac168e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high-confidence ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://chcial.ru/uplcv?utm_term=dog+crying+crate+first+night PDF link annotation
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/2dc8435222843641e8d4ab7d93c2e935/kasedavazurimivigugar.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/r8vluv81q6b3fphhnif146j4kt/1737110398.pdfIn PDF document text
    • http://nhaphangmy.us/upload/files/24483019410.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16070777841d57---wafikanojadib.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/76523395318.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb54e0f11c---71269189476.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/82276090081.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/2oop3rqk59dm0g2c4nco9527r6/xuwezilagikivulinimezovi.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ddbac3kqstnkoqg404b9p7u1o4/pitatidovazigegez.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd566f1e75---95134125792.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/sudib.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16245036381742567142.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/56251150698.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090cba0dcdf5---68248173017.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/54326938301.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/53491162319.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/luxifikerifekageti.pdfIn PDF document text
    • http://asfcursillo.com/clients/879797/File/75689570087.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/cdb5e75469a5aa8afae687cc4e853be5/gumepebikida.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/a2ths4gne357u0qn819mln9kvc/90878376118.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/24589246178.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16098e90f95097---54861187451.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/zirigamegitedoj.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/2d4fdea0c11f6418e0c596489a9ad7c1/tepozizeseborotovujaxil.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_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 16568 bytes
SHA-256: 9461eb84c3d94539e50d8ffab8266fb55f9e5d85b3856db80b2cd8cb842715ad
font_01_sfnt_off0001156d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 10684 bytes
SHA-256: fc3ae7efa4c35a294b15ba6028dd7668e600dc71fd772a820e140b13ef9babb9
font_02_sfnt_off00012df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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