Malicious PDF — malware analysis report

Static analysis result for SHA-256 294c6d498877c4e7…

MALICIOUS

PDF

107.7 KB Created: 2021-04-06 18:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec6d9907d16ac7c94135d8d93aefd1b4 SHA-1: 236919ceb02bec449493eb31948d330bf8ddd41d SHA-256: 294c6d498877c4e780fb5187b2bba7d469292195b38a68317d87c116b81d3968
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a significant number of external links, characteristic of a link farm, with several pointing to potentially malicious domains. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=eid+date+2015+in+pakistan
    • https://cdn.sqhk.co/sejiragidu/K4gfhiq/webajikekawevo.pdf
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/nivaxusak.pdf
    • https://lixavoje.weebly.com/uploads/1/3/0/9/130969842/pamodolawisowuvetife.pdf
    • https://sulefufevonabu.weebly.com/uploads/1/3/4/3/134363738/127561.pdf
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/vozugovonuziv.pdf
    • https://cdn.sqhk.co/waxoxewanuvi/uibvZBb/wells_fargo_mobile_app_login.pdf
    • https://xupukowipor.weebly.com/uploads/1/3/5/3/135304830/27ece.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://uploads.strikinglycdn.com/files/8786c220-2119-42fd-ae4f-64aeed73ed90/duxuvomamaxekefevuxesabuj.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_d3bcc493c4154b55b340845da740cb86.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3f3db063-d70c-4bd3-9c2f-8e3cb796fff8/11713566240.pdf
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_78939014b24049aa94f7930e26e1e73f.pdf?index=true
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_14609be6d0d44a4eb2573adcf5c8b8a2.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e731863b-8c68-492c-878c-fbfe89ff0389/segetuwusaxerawu.pdf
    • https://e4c06157-4c4c-4c30-848d-1ce07482e123.filesusr.com/ugd/99e070_36531d1e0cd34e6f952bd9d7d0c5d789.pdf?index=true
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_09859b917f6b41e0b4b445aa936b8599.pdf?index=true
    • https://ff5d1526-1eb9-447d-8915-67ca9933f1b4.filesusr.com/ugd/9565fd_cb15819bba3e4af095595981b3e292ed.pdf?index=true
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_6ad7ece9d37d4396bf5580a4c2951149.pdf?index=true
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_d6e80849068b4786a7e558cc277787a2.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_590a22ff0f40436e873942838b112977.pdf?index=true
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_e25290220d384aa2868ebc0d056502a6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016dd0.bin
74a091b3fcc06a8d43d511d88f0e53a49ef6239c4871da1c2b0a7a798c1fcd33		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16DD0 22152 bytes
font_00_sfnt_off00011c20.bin
854d2e47b457e2ed5185e94dd8b41f3bed59b3a76e22ab159f7b6c7884f4ae98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 5296 bytes
font_01_sfnt_off00012e40.bin
0816da6ddac0f438c53271a0600b95aecf90a120ccad9326acc6c060ec2316d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E40 5096 bytes
font_02_sfnt_off00013eb0.bin
8a0f764fcbd469003f81004eb6e379e1857f786f2510a8acb27e5ec5890ad1ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB0 16064 bytes
font_04_sfnt_off00019398.bin
35d4e033ec513ef5834b703244928b07628db1f576aaea779d52020226afb6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19398 3560 bytes

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