Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fed47ae91d4c73…

MALICIOUS

PDF

85.1 KB Created: 2021-07-05 13:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 09cfb34f35d9aac5067f2ea74db6d7e3 SHA-1: 6a725b19d40ff2a362bff3f867d84728b85d245e SHA-256: 34fed47ae91d4c734636827b04cefd1aed8158dda2c058c3a7effc3f60273c6d
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 as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content likely attempts to trick users into changing payment details. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. The presence of embedded PDF objects and external URI references further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=token+coin+cryptocurrency PDF link annotation
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2334b7bbd---lofoxulefusefegaver.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/54545424611.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070175b90308---soretuben.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/b5tuff0fsj3uc4vgbik1tolql6/nikudamirotemobamoroxosu.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ccueidv51f41b41cordt2gmn94/zivilimixuzafu.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/bevegi.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef9067bea0---36303036254.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/93718671040.pdfIn PDF document text
    • https://twfern.org/upload/ckfinder_temp/files/20210620070837.pdfIn PDF document text
    • http://at2apigroup3.com/contents//files/50241744158.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/rogudav.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/84ab48720415fff667cd470a5be18862/silizesuluzijuluxonidolol.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ed7b68d930d33594f6a8dfdccbc124d8/datubamu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/4324q27pjvpbuherjota2ftnac/zasamemizujojanamefa.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210517094917.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/67358353162.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/9f02df9982b94a56f2f75d55bb151164/83830537043.pdfIn PDF document text
    • https://aashianarealty.com/file/ponegizavimusijipuzedufoj.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/9ebqtq1uj9gas0mvelqng2vjdl/xosiwurisa.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1e4453147c08c7cb3ff842af351d177f/5580754547.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/famavojinevanomujogo.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607936518f39d---40588747669.pdfIn PDF document text
    • https://dineflon.com//files/mipepawetutakef.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_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 10260 bytes
SHA-256: b7bc5ad536f2b84a3245710b3d5ed164259a84187d4925210339881e04e45428
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A73 16644 bytes
SHA-256: f0fb8bbddeaf308f6af96aa5d282c0cfe9521cc21e08168c7107fd0532a67d59

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