Malicious PDF — malware analysis report

Static analysis result for SHA-256 697e18c9558484c4…

MALICIOUS

PDF

70.4 KB Created: 2021-06-23 09:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7a327f3ff85e981171b334bffe333437 SHA-1: ce8fc0a0c3362eca884399b12279d35b3b3568d2 SHA-256: 697e18c9558484c457e9678f1ed01e1aebbda3a4ac0edc0f94aee6d256c13572
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of multiple compromised domains is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a5545d9aacb---tikezonaravofinan.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609452e23803f---10894274960.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/3048807803.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5bc838981---47997027443.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/b59260873f04f599a066a9cdf7a8e6b1/vepoxile.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/fqohnvbod9lpt6fhpdg53abclc/nozujisutuxetejajafe.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/94158945192.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3e4da345---jukuwemoliwexurabuvep.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/5b198f9026a913563f6eb1c627d18a65/mesebezawanar.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ac90755092fdccff2cfe291c5e45e0f5/93315477234.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/gogatajojipakosesum.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5347205d1b195d4e348ff605299e571d/dufuxav.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d56edf26d1---pudexumew.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081569cccd92---fugirepuki.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/45003971792.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/jaxakelevubexur.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/35400490367.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/8051107612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=multimedia+windows+7PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AD 5052 bytes
SHA-256: 677c5b119a130354106ad255adeb13f1d208ee46f5b6418e5d17cf200de79d72
font_01_sfnt_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 10752 bytes
SHA-256: b097fd04acf339ba4a42bc3c396f591d2d925fc6e378856db7db80bcd33da0eb