Malicious PDF — malware analysis report

Static analysis result for SHA-256 6064924fb90a63f0…

MALICIOUS

PDF

78.2 KB Created: 2021-01-10 10:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4cf5997cc4bf5c4cc96f415430fec3ee SHA-1: 1db3a58377b220fcc0800b8d0abd5a8cc4e51c39 SHA-256: 6064924fb90a63f0262488e8902747ef40679f8ff6c49056dca9e22c13632c21
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=monster+no+goshujin-sama+novel+epub'. This, combined with ML and ClamAV detections, strongly indicates malicious intent. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its lure, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=monster+no+goshujin-sama+novel+epub In PDF document text
    • https://site-1174749.mozfiles.com/files/1174749/90377460228.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8708feae79a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5f9ed23e4156f.pdfIn PDF document text
    • https://site-1168325.mozfiles.com/files/1168325/lijuwogazemojagizebuza.pdfIn PDF document text
    • https://site-1172169.mozfiles.com/files/1172169/zumimesemetixu.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/fDjhgee/archery_shops_near_mercer_pa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavalukato/botox_injection_technique.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/2945976371.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/29001586924.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/ikea_galant_desk_top_shelf.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/converting_measurements_of_length_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/autocad_viewer_for_android_tablet.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 3100 bytes
SHA-256: d53cc5d8d021a52fd0c733996c6bb12b3559143525d313ae5842f738549f3b5e
font_01_sfnt_off0000dd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8D 5548 bytes
SHA-256: 65136d537793774fe1af72196a062b3c235c73a6f856b6925e68dbc3b775ab90
font_02_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 11412 bytes
SHA-256: 52d1c258c7cccc2659caebfcf1bbd622f16ba62a38c01d8a35b9d3188c7a9620
font_03_sfnt_off0001167d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167D 16132 bytes
SHA-256: d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7

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