Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2d3de92b3bba7a…

MALICIOUS

PDF

85.8 KB Created: 2021-07-13 20:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a937de43ba342f6195d049a03d373fc2 SHA-1: 3e45939deed81cd42882e1cf5b3ca4a8516ba54e SHA-256: 9c2d3de92b3bba7ac00d1fe9a5a76ab5def931370ccfdddafe25ed4e1f72fca3
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Several extracted URLs point to compromised CMS upload directories, suggesting a potential distribution point for malicious content. The PDF's structure and numerous links, including those on disposable hosting, are characteristic of phishing or malware lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://short-story.ru/upload/file/77785296182.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082b95c95c11---43432304989.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/397f18b6ca9aa6fc7a9be4beca5ecf0f/93591033405.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/13230318736.pdfIn PDF document text
    • https://bczenekar.hu/files/file/41131613405.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1044653d0---98310155780.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/71094604051.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/tixezirasuzo.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/fixakilipanumapig.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///82968825846.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/o3d4j9ejt6coj7l9qhagu79467/67290629546.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/fagakobanafavi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf4eb46d64---16975213930.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/b54dfe5eb65270c5be615429778df34b/ratigesujaxewomoxolar.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/pdui456cttfh83tcp90j7i04af/zobobun.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/e1n8otn3lm8qq36dog98qmmgb4/45286982931.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/xewipiwuto.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/71666261262.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d90cd0ad933---sipofupowakiko.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/sau4eg3ojcfh3pu44fg7ftor49/xumisizaxupakifajiwewova.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/73710376685.pdfIn PDF document text
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/1084925211.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b14116132---22580998107.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/50445351098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=baby+hiccuping+in+wombPDF 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_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 16644 bytes
SHA-256: 6df3c802e8b007199dddf52b65a86ae9043b4e02edd8fec948261319ad473d95
font_02_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 10772 bytes
SHA-256: d4f19b66f73f1d455ef82b63f17ae509f71b6e3f4464f64abf9599e266c71e31