Malicious PDF — malware analysis report

Static analysis result for SHA-256 5630150d1215d486…

MALICIOUS

PDF

81.8 KB Created: 2021-09-09 10:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6b4eefddca9642d8bffbbfd6a35c21e SHA-1: aa4b13a2042c93239e5b70e0448f6204194d3928 SHA-256: 5630150d1215d486fa4026640d020150a7aa88597fbfc540dc96f9b3f1b29ee4
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 payment redirection lure and ClamAV detection. The document contains numerous external links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a phishing or credential harvesting attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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://krisoc.ru/uplcv?utm_term=how+do+i+sync+my+phone+to+my+vehicle PDF link annotation
    • https://jeneifogaszat.hu/cikkdata/files/kemozulimi.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/20443857769.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109091306039114.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/18639733943.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/84888012127.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/89409518767.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/diburidasoparexese.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/68444473946.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/jedudatuluweno.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/lefesas.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/52816604593.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/4623224052.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/48f4e15fbb397816dbd3df6ffcbce167/39709947410.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16135ea3626701---mevaju.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210907170439.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/gevevinokilijupujarur.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/22593730514.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b89633a7f---91142696380.pdfIn PDF document text
    • http://kmsenior.org/file/files/mezun.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///zivewivopemidukarigoraj.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/razarudabixabifar.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/74638935718.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dufuxajituxisutiwadowadaz.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/niladogijipazuto.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_off0000d6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BF 19828 bytes
SHA-256: 016d887122f615d3ccc00afc9d30ab6ebb069bd802bbc8e7b03f9bc7c4bb57ab
font_01_sfnt_off000108eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12102 10776 bytes
SHA-256: 638159f8bc923264e54c547844c7bd7546d52ee12b4485085fd3d627edd11d79

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