Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdac78478ac3ed7…

MALICIOUS

PDF

80.6 KB Created: 2021-07-20 23:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d82e8c0cc73a2cb88c01629464383555 SHA-1: 07fcda78fc6f9253b49d8878146c743261291ef0 SHA-256: 9cdac78478ac3ed74d081d62c9ae880b1743018709e8820fb99bd7cadd244c3e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b1bb89238---86930404371.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/29381145476.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9d8d30560f4783ec4cdfd958b195e166/wuxejawebivopedonev.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b589f359b1---4081203944.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b55201baf1f---36904026892.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/23288532862.pdfIn PDF document text
    • https://micro-churches.net/uploads/file/40585053727.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/donomu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/durelopeduwidobewe.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607803022eb5a---sifufazani.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/jaruzomavofopagosapexoz.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/nb6gbnru7k53p8pbcekhmks1vk/wizigabigasunibusepawe.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/rajexorupobenir.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/2099646114.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/pd6crb94rktlon09t087q14nvh/jubifovivaditotoj.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607122c7afa8c---genuzofopivisob.pdfIn PDF document text
    • https://nic-n-nate.com/files/files/9020356556.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/43613792935.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/81254923860.pdfIn PDF document text
    • http://henca.com/files/details/file/ropufesibimilagenela.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/f405c1ecadba9ae3c0227131dc84a064/94850488397.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=free+message+tones+for+iphonePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D9 17492 bytes
SHA-256: cb3cfd7dfa53256741bfae1349a81a65f3418bb3a623af9b5dd10190db595172
font_01_sfnt_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 10736 bytes
SHA-256: 007dd5c050bdafd52c659c9f366688be76a77b221045080e33726b28a788ab0f
font_02_sfnt_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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