Malicious PDF — malware analysis report

Static analysis result for SHA-256 34dae18286123a6a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 19:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 511d7ba281e7483992ca402ede3da429 SHA-1: 03a506b16e339f683166728df023187136a12c59 SHA-256: 34dae18286123a6a016d68d6cb5cda518a10a2e0f97b7e22b91c8634b9c8893c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ketchas.ru/uplcv?utm_term=manual+epicteto+epub PDF link annotation
    • http://agriturismolescuderie.eu/userfiles/files/95537078936.pdfIn PDF document text
    • http://riviera.az/userfiles/file/nolamokoxetabexi.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea7242d6c7---41557732180.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/34359016498.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/71632996714.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/86009787604.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/68142822070.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d1d3ecfbd---90683290906.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/vadugiv.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/zolelasasi.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b4fd9b59c---somezulunalisizu.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/nulosozamaw.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/60832916169.pdfIn PDF document text
    • http://geodez.com/pliki/file/60116884838.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/35809190204.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/detidegirenobudaki.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/17841214533.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/95511834703.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6a65e4b56---21562962037.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160da3f03b2eab---vimej.pdfIn PDF document text
    • http://timnhanhonline.vn/upload/files/88119881659.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/lilitoziromoxibevunazow.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/vr4mtansk6d5g12te0mtf47oem/xalobukozu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c07b038a930---22003660621.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/tenivil.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_off0000da2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2D 19360 bytes
SHA-256: 4b020fd8d20a7c0c342c3a864ff879192273b22a03fc2ceecc17e2b523646165
font_01_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 10332 bytes
SHA-256: 0a3aaad49bbd6e15c53243928219248b48e854f093c2d023ba088c0e677b16cc

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