Malicious PDF — malware analysis report

Static analysis result for SHA-256 d563e00cea5578bb…

MALICIOUS

PDF

77.9 KB Created: 2021-08-26 00:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ad7a97a26a927cca20d326b89f04a277 SHA-1: 0f60bdb0dd536d56eadb4aa0dfdae3bb479e2e70 SHA-256: d563e00cea5578bb41441448e18bb3b5c4a53c82b4fb0582f4d51e1d0002aaa1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d12ae3d79---8901144868.pdf In PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800417b060b---12896961925.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/pufebupotunavefabotej.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/0c8136c77a984cbd5f0d0b090eff8d32/nomenadodobofefus.pdfIn PDF document text
    • http://herve-coiffure.ci/files/67921624345.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/34713151484.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/viromowu.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/ledug.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/zozebigezufapojus.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed419937ad8---zemixoloxijivoleruzov.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717a0f0f22b---vofoxivuboxodidovuz.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/c1f3690542f56d7acb5f01313359f8a8/33165447916.pdfIn PDF document text
    • http://groupkaishan.com/d/files/futopulipekekewomevumudej.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/pitofidutemape.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d44f38d01---2148561919.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/14181967616.pdfIn PDF document text
    • http://delve-cr.com/uploads/29980066765.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e02a0aa86b---84733533569.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7512ec9525---62827606159.pdfIn PDF document text
    • https://go2germany.ru/files/file/25638434485.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/24016537821.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f59f673b83---gulegolusupimojegaf.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6388c3f8c---bamovados.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8bfb7a1246ba18cb0ce595d5060fc03c/lisunagituw.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a892b0d977c---94090337787.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/72936744162.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=organization+theory+structure+design+and+applications+stephen+p+robbins+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_off0000cb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 11340 bytes
SHA-256: 1e539fdff1cce0ae1042252c8f6058ef81e606d35951989c4cfaf9222bfda26f
font_01_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 16528 bytes
SHA-256: f69857ae3001aff75f0a507f743edee2f163ca293eb163220596f5e8873596ba
font_02_sfnt_off0001108e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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