Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e224e323fd7d47c…

MALICIOUS

PDF

86.3 KB Created: 2021-09-05 12:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 80ed9c3f03f59c3010a8f92d80382d21 SHA-1: db5532da6fc3dd05f53526a5d41d3c499e983e0c SHA-256: 5e224e323fd7d47c178964cf7fc644d9fc5da6195efeab46482c1330b0823acc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://achilleferolla.it/userfiles/files/kabuvevafuzifat.pdf In PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/febonisewis.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/31105555060.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a539f3283d8---52204803637.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/91450515031.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d575258aeac21b3bc0d543afc51a6c63/zetiduguzifitofezu.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805501afe2d---ruxan.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/9d9b6fea282a179e535ad98e57e0a643/8936691132.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/39808785115.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/21138053194.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/kimiwukuramejaboresix.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/1719800000.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bdfbb68fb---52680804244.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9db007c1d---xefexolulebuwe.pdfIn PDF document text
    • https://essaidafm.com/uploads/FCK_files/file/92811159838.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/wosuzopoxosigad.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/rixivedujusawax.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/fufozekevi.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/42533099548.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c833a4196e---zumaxanasefezezat.pdfIn PDF document text
    • https://orangerun.re/photo/files/91153620951.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/34288759227.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/aad904003a4321e4ab3ba81902dd68c0/95889501440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=mis+queridos+mallorquines+libro+pdfPDF 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_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 20208 bytes
SHA-256: f938c7afd3aa9d25f90724a79e7cc235f06eb4bf66dc735ad209bb9ee9d6c801
font_01_sfnt_off000118c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C2 10940 bytes
SHA-256: a25b667b01945410dd3b4938fb51213df7c080c9f21f38e5f2d7a89dbda3c5f0
font_02_sfnt_off0001319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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