Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c4c47be5686a3e…

MALICIOUS

PDF

73.8 KB Created: 2021-09-02 23:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5f1483ddd6a459ccded77991675cf5cb SHA-1: c04f732b89670bc5c85b6a357e30f9c69583235d SHA-256: e8c4c47be5686a3e69a2861118b49c82898d7cca1c6f51df03d096ae7fb6be1e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://philabc.ru/uplcv?utm_term=plumas+de+colores+para+manualidades+chile PDF link annotation
    • http://sarljarry.fr/userfiles/file/rutegaposokuzosikufoniv.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/zaruxelesolujeduseguvelu.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/zidasukewigeretuveso.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/f92823fbfbdebd2a6f8cc52df9bc94ae.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/61689a4d8665c0f7ad8932825e50d86b/lafagisesuzitubisaxop.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/83423811037.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/obmj01sfngtdsud6ljgoefeabl/7900647330.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/6755501777.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/888624fde69a87df3a808dfd21b7e71b/senuzojadewapapala.pdfIn PDF document text
    • http://wearefamily1234.com/clients/3/31/31b46d3307e4516335aa88350909469c/File/dofufu.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/nuvamejotifala.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160714f269fa4a---21132826080.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ti4s701mlmt05pa1sdie2ifc08/jexebe.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/55346891628.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/a234a72e47e9e369fdb8efc31beb06dd/45628781728.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/13389276433.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/95kn2ss00smudqi64srbd3a286/xefalanusukukojido.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/02250b65b177e42c9d4620edde6cf147/jokim.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/44895315296.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/87223793788.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/kixet.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/69915557398.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/2912b624bbf3a5eb42898383cc068dc1/xasale.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/59084009180.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_off0000bae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F9 10780 bytes
SHA-256: a30535476285842fca4502d5a1999b42885d3c63a7a249c5e98aca8f691617b9
font_02_sfnt_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 17424 bytes
SHA-256: 698061a08fbe8b1ca083a299cd74fefa7c214a373354ff3451d07e9520cb8674