Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc470e8b6e1a3e4…

MALICIOUS

PDF

74.4 KB Created: 2021-09-02 16:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 59c9c36496e6c77a4e0e42825b02b253 SHA-1: 70b5e0682ff5c70366c1e906952d677e7a515563 SHA-256: bbc470e8b6e1a3e470932bc80828f582df1b9cc61fd6b530d1785bdd78154aad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or scam attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://queure.ru/uplcv?utm_term=community+medicine+buster+pdf+free+download PDF link annotation
    • http://kingcraftviet.com/uploads/ckfinder/files/55664236052.pdfIn PDF document text
    • http://momsystem.ru/public/file/25731062930.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c0f78470c---39333211971.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/44e767a98c83c63825f944d4b6974ff1/sawokonof.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/c5e0e455c7da930204476061919b3025/rajesan.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/miwekomib.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/76928222728.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df02c5eb32b---46154978940.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/24428085217.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/98752618615.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/gipuvugokikosuze.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/cd43549ca0a0469a5b3ac88b7ef4c4cf/3037622030.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/02050509c82b9d7ca8bedddc5fa7b976/65509262417.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/e8cc864d2fa0e1f26666a71e7bf03f5c/12852121370.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/37033207066.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/94299867766.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/33e8e46b101220fba6f838d826fbec30/50721242566.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/jbej35ps74jmstv6ndqekcs4cg/85420289901.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a2e5da170976761c976836a9f952d57f/6397740715.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/92def2e435f440ab676e1ea46f479f1b/zipesamevubabiru.pdfIn PDF document text
    • https://mikludava.lt/images/files/92654870288.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608f47f20fab6---notivofozujunetukux.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/zepudibikaporogutovarim.pdfIn 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://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_off0000bfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 11252 bytes
SHA-256: 87d0e55962eedb227d68d5b0dc59d4acb3596988dd1c7bc8ad5826e1dcc56d01
font_02_sfnt_off0000f233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 15988 bytes
SHA-256: 2298e299d8ed37efb4ab3582dc901105b2f7dfcc85879fe333d2329edd596c7c

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