Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e9f12883301718…

MALICIOUS

PDF

88.4 KB Created: 2021-09-01 14:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 74159bf43800504c7ad8caeba7387945 SHA-1: ee0b82d65fc4b37aa527073bf9b5473e3d0f7f0b SHA-256: d4e9f1288330171844de99b51aa9107d7ff15d6fd7495ef5dd5af14adbd55f31
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically impersonating a cloud document service and presenting a payment redirection scheme. The high ML classifier score and ClamAV detection further support its malicious nature. Although no scripts were directly extracted, the document's structure and embedded URLs suggest it is designed to trick users into revealing financial details or initiating fraudulent transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 8

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/72b0ae2a50a05d899d97587d80135336/bidobonediz.pdf In PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b62b66c7b04---ladeduzibevesojuwulosog.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/wetituvibupugabozigevax.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/rewisupalewepebujofevemos.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdcad9eec2---zuwesufobezaz.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c17dfbcb---89947435292.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/nejosisedik.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/3p0dtrdanuru2lljffr8gfttk7/mizulisoke.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/65773268120.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a81c4a0d41d---dojofi.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/4r84ea66l1ar9b9qqn4u0je0jf/54426056874.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b00194091---25684245545.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/386a5f64bb94d0144370676c9bd65363/rozamufatowezowagixis.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/58512818595.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/subor.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f85503470---xulexe.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/8088685356.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/1njcktss750uas3pslqd60ib0c/bekowakoxexuletilivisexuf.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb90d376b9---buwekewagobire.pdfIn PDF document text
    • http://protok.pro/upload/files/96010469998.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/e94496ff9bf175c338fe8f0a017a893a.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210709_1A1ED9EF8D4C550F.pdfIn PDF document text
    • https://hobbyschuurtje-webwinkel.be/images/userfiles/file/vagivujasuxubosetilebobiz.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gubavonogeb.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/3308jp90hti84clbbgh4jibuhi/29422623166.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/45288582617.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/72680508577.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/wesen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+save+pdf+file+in+mobilePDF 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_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 18164 bytes
SHA-256: 38a5df568990709620b827471c07ce2a963473a4bc916aaa2e4a09ce3b8fd315
font_02_sfnt_off0001397c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397C 10844 bytes
SHA-256: c80abb38fc2d3d812957459ceb5dcefa12a98438f94e5638381aafc2af785797

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