Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2b63a871d107d52…

MALICIOUS

PDF

88.6 KB Created: 2021-09-13 02:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: be146578dc5b47a8e282f7097971b2f6 SHA-1: 59f535ca19916f5265f8d95f3c3557b632d53708 SHA-256: d2b63a871d107d522185a581b7359c9d06506cf69cdb718bb169daabe458c5a7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a Business Email Compromise (BEC) tactic, aiming to trick users into changing payment details or initiating fraudulent transactions. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://spartapr.com/images/upload/file/sasikeraligudo.pdf In PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/22608216933.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/34063670474.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/25287869426.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6407944d5---27042422358.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e727e184db---26700277422.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353b1de2626---46168242961.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/zufikev.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109120301097831.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/lotag.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/kezomirafumafozo.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/1227c5df854c666e3216ba0c38796a51/zikusowuf.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/vodelikawozuzugubug.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/reruti.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/kutar.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/50364786849.pdfIn PDF document text
    • https://sealskinz.ru/files/file/fubagivuwebewatetizukeses.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/81208207231.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/37504872415.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/46329879885.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/4150196557.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/67495601945.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/40441708804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=synchronize+outlook+contacts+with+androidPDF 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_off0000f26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 10996 bytes
SHA-256: db2d18d8f7d4f8c5c8e832070c666d826406c22b5e8af3f1e77b55ed03d72e03
font_02_sfnt_off00012412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12412 18992 bytes
SHA-256: 22d26a1d7eb8c4f3fb705a9fe718443732a0d3a38b17cca58b869525a26e66d1

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