Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e4e02279bb483d…

MALICIOUS

PDF

95.3 KB Created: 2021-06-12 16:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fc0e68d6cf0a6bae4ccd1a38f4e0800b SHA-1: 045cf390adfae764b1047ca54730775bfeab1d5c SHA-256: 59e4e02279bb483db3447c370ddcfbf9175ada0884aa31738527f71a714963c1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate an attempt to direct users to potentially harmful content, likely disguised as a software download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=wps+tester+old+version+download PDF link annotation
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160987f969c8c4---jivutonemejojotisuket.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074171f0597c---9162732564.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/27191390338.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/dfeaf0e7b000e7d22c2dae04d934bf14/rudososamozuz.pdfIn PDF document text
    • http://halaljones.com/uploads/files/nadalesevitux.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085082ce0375---62073165837.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/fetewoluxokokunesobonawik.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609b180e5c6a7---62767530192.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/ridazomoxesupimat.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd6d766d2a---bakibetagabi.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/6e33d667e62e7576759333cc0bf39b8e/23876733765.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941fe5125aa---61337352829.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160813bc59cbd2---vewubavopobafi.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330510a0f4---lobogubonofe.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4542794ee---xubozafatagozagidulaxezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00012204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12204 5120 bytes
SHA-256: 5dabe132a6904bf824894c75031adbb6dd81e23db10e6347d2cae3977cb2d0ff
font_01_sfnt_off00013392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13392 11080 bytes
SHA-256: 2273fb44d961f6ab71d40b883314193723f85dd7b2c37cecc27d6e0ea90f5a00
font_02_sfnt_off0001597c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597C 16484 bytes
SHA-256: fd37f8d0f678b662b1226caf967b0a958ddd840d284d9b641a33821b87ea80e8

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