Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1aab5f676b14ac2…

MALICIOUS

PDF

92.6 KB Created: 2021-06-13 19:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e5b2555882f2b20274379efa190171f5 SHA-1: a76af67a17e6e006064f1a25fa228d1f8d1058eb SHA-256: d1aab5f676b14ac2b188ff7ce12869b867d931b036911ea70f3da0d6dba02e04
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://coretry.ru/uplcv?utm_term=kite+worksheets+geometry PDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/90s2ori7kkl7eps6t952um6f2n/45204728465.pdfIn PDF document text
    • http://coffee33.ru/archive/file/fimimavawulujulo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ec847e9739984fe949a8b9dcbe3e3f30/27437814988.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/27718537278.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16091f6faa51d5---vozodares.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/kt3tnbde803ropctggrjnqkqol/jovoma.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/jijanome.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/59346808454.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1b331181---kafuxujozu.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088a213942b0---70848189020.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/06d7930b7ce7c501dc91ca5fee0f0d03/tomimizavidiganasefol.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/sqadfvdnh5dd0jpknsasb14u1f/44538275195.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/58869171908.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/tiresasa.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/ffbdc970c68e577efd2c1b3bf8efb59e/lotepaximilapadaxenalix.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/vofijaberutiw.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/bulaxazojegoruwu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f576e3f30---42211801576.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF696 8396 bytes
SHA-256: cd36fb4ba9c7191e2ada258602a64b6d60889d512f59376a0600cfd92b1d5aee
font_01_sfnt_off00010cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBB 1776 bytes
SHA-256: e8af6d7b76feeda9a9fff8c5042e8f88e14e2db8b74c22857d584e3343e2b588
font_02_sfnt_off0001154d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154D 5084 bytes
SHA-256: 44a4a10c56c24dfcc648d7c3a8d6c3c6259b25a9f67c1c535515537696b05485
font_03_sfnt_off0001268a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268A 11524 bytes
SHA-256: 545d990eb5cf396baa3fbd57065d65b87c6791273fa579a0fc4f9323302caaae
font_04_sfnt_off00014df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF7 16424 bytes
SHA-256: 9629b64b662efe700910286c58169e5db8905a07ce98343771ec1448deb2df0f

Open this report in the interactive analyzer, or submit your own file for analysis.