Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dacfbd07e90f449…

MALICIOUS

PDF

85.0 KB Created: 2021-01-17 01:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e9deae3164f5c3e6c0426fcb03a4f77e SHA-1: 94a0626df9a7bd0411d4427bb8f12ad2f11b01b8 SHA-256: 9dacfbd07e90f44930dab1f2d2dbfb5719d86b9d747febac1dafa289b60326b4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

Heuristics 4

  • 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 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://ggtraff.ru/123?utm_term=freddy+fazbear%2527s+pizza+menu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477629/normal_5fda8efecb5ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_5f9624c8094e0.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/03wk7qW/37228877960.pdfIn PDF document text
    • https://site-1178187.mozfiles.com/files/1178187/ateez_fancafe_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f9315e0e0cc4.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/643144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5fe19e4c7859a.pdfIn PDF document text
    • https://site-1180550.mozfiles.com/files/1180550/27703291.pdfIn PDF document text
    • https://nalavawe.weebly.com/uploads/1/3/3/9/133997318/1093605.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA9 5128 bytes
SHA-256: 849c9988b7dedfa203d97cbb13350ce1b981127a5f90c3af44111b89cdcff9e6
font_01_sfnt_off0000ee00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE00 3484 bytes
SHA-256: b54762f19ef417d85f82b9a590db32093c34483c2d7cddfb5cf74a58f197e439
font_02_sfnt_off0000fb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 11388 bytes
SHA-256: e3d798da77696925d0e3d3c63fe454492e15018f88f1362104c4512948ecddd6
font_03_sfnt_off0001224f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 16776 bytes
SHA-256: 6c46c359bd7f15ba11fd5511a8fba6663d05e2591087e37b33ac8b837186b6ea
font_04_sfnt_off000138e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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