Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67625aa3a316546…

MALICIOUS

PDF

77.1 KB Created: 2021-07-17 02:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 88f36be3f250054cd0dc8b0fd644a796 SHA-1: c76bcbfa53562c492a571ad343dada4d54e268a1 SHA-256: d67625aa3a3165463da844affd1108f880ef11e3ef7898a6f5537a95dc6a2c56
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The 'Remote-Support Tool Lure' heuristic strongly suggests the document's purpose is to trick the user into installing or running remote access software. The numerous extracted URLs, many pointing to compromised websites or disposable hosting, likely serve as download locations for malicious payloads or phishing pages, potentially leveraging JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://khanaphatgroup.com/UserFiles/file/rirani.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32bb7fe90---66754257484.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/49822192529.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/gotonegodopaxigoma.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/99386516973.pdfIn PDF document text
    • http://gyobel.itpublic/file/26304940083.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/3d8845d6f6ec3dd99fb7bf71dc2619cd/wejuvedudu.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/78864587682.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/49564728523.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/784qs95ash1knrn87lkuo8hh57/50965882759.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/360faf0c53a4d000d3997925334811d1/xipojigugeso.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/zawaru.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6c4b82029176d8bd2513bb3dd32cd8e8/misitimuromafa.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607303795353e---24122613883.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091dfaf1e559---wutisisamekipezusogajoneg.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f2d3d4cd4---96811473344.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ckapcuqsdi55574ncc21ufb7pj/44484710906.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/54095827582.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/zosotawedidamepawolipi.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/4910343408.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b64af36b5---27920749326.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/30224015764.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/kuziwanubusinoxifito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=easy+touch+auto+clicker+apkPDF 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_off0000c97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 17684 bytes
SHA-256: f8b93f12aa7f5a1eddfa82b9852cde48b7d675a67bcd50f62bbd04e4845a40a5
font_01_sfnt_off0000f6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A7 10656 bytes
SHA-256: 1f062055ff52ce263dd1769b04576d582189fd9727fc1642cd9151d881b0591f
font_02_sfnt_off00010f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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