Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6091c36e923bfee…

MALICIOUS

PDF

75.8 KB Created: 2021-10-09 21:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 03dfbd8e0142f2aebe9aef523de835ed SHA-1: cd25c1c8b3b1f8c84b73ad04e5bcfa87f1d5a332 SHA-256: c6091c36e923bfee1af42016101678912cf68482e54c78a61eefdf2ed1bf7bc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many of which are on disposable or low-reputation domains, strongly suggests a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this by identifying the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://philabc.ru/uplcv?utm_term=just+right+height+no+bucket+required PDF link annotation
    • http://syntrend.critical.tw/upload/files/48283207688.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/xavez.pdfIn PDF document text
    • http://muszempilla.com/files/file/xafegabileraburururisu.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210927104659.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ac67e9d32c7512e262cd8f2e8d3083c9/4394605658.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-2/20210902121013448630.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/5006666530.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/favumizizaref.pdfIn PDF document text
    • http://liluby.com/upload/file/ridadalumuruliku.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e6b515a90---tipeg.pdfIn PDF document text
    • http://delve-cr.com/uploads/70435820006.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/jurigizegikoxixefab.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/dawazerigudepakunip.pdfIn PDF document text
    • http://intertravel.hu/_user/file/15430411747.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/18773218719.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/92529318424.pdfIn PDF document text
    • http://indel.sk/userfiles/file/xibazexurofovi.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/rekekutesolozosojidabo.pdfIn PDF document text
    • http://em-ail.ch/pictures/2/32134781841.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/vopiviresar.pdfIn PDF document text
    • https://zakazspbwatches.ru/upload/files/38606056479.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/jowugepamataguxuvosimo.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_off0000c201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 18636 bytes
SHA-256: fb0bb24f15a8f519f09da2f1c7bf18c5608bc7ff6bbd1d83d75b3956850a045a
font_01_sfnt_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 10912 bytes
SHA-256: 59a2ddbda8537e74f33ca3a5f1f895a9b6325ea474219dc101b48d93346e7725

Open this report in the interactive analyzer, or submit your own file for analysis.