Malicious PDF — malware analysis report

Static analysis result for SHA-256 f79c566b64ab2b64…

MALICIOUS

PDF

82.7 KB Created: 2021-09-02 08:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 617b9d93e791a9ffde8c23060cd52b46 SHA-1: 8c37ca3f65f23536f5d7706c675d56f0905554bd SHA-256: f79c566b64ab2b64799be27ccce99bce5c79b8f0e894b5c93678b7b868b46d05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML and ClamAV as malicious, indicating it likely exploits a vulnerability or contains malicious content. The numerous embedded URLs point to compromised websites, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with a link farm designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fujiya-la.com/uploads/files/todirajelujajiravelu.pdf In PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/43f5pakvh28psl8e9qt6kqjohr/47711995572.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/sikunimimonomukewetuvi.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/5211c9116b3fb2a7a46d9b93553611d9/34238447132.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/solunugewugeb.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/sesawupagasotakazil.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/70834277450.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1fbd12274---netevezem.pdfIn PDF document text
    • http://mutitar.com/user_img/files/gafunibarafuwatikado.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079487022883---rewuwagibufipa.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/82011661898.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/48150038566.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/84165624746.pdfIn PDF document text
    • http://anaminfo.com/attachfile/file/kodin.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/82700916625.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/58336713918.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/15ead5a2b4c82f24d42a92d8e228f7a0/53481999595.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/deporenisutebad.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/25738333085.pdfIn PDF document text
    • http://klefmarken.se/upload/file/67037363570.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/f55a99c9235d710591cdf340fd43c60c/kigipurex.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/459fdc51ff132ae0dbe1abcfb9381333/62096884853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=about+father+bible+versePDF 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_off0000db8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8D 18600 bytes
SHA-256: ecd202090ae0d33128991544f1afdf992447be4a4b965b1611e544adf536a415
font_01_sfnt_off00010c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001244a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244A 10496 bytes
SHA-256: 680ec5823da3acf3788002576b8d304f61d181bfab637b6851e92b9b48ecd5bf

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