Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76555cc9ef327dc…

MALICIOUS

PDF

205.0 KB Created: 2020-11-24 02:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: edde72b7df4558259c5ca443c46c542b SHA-1: 5fd7867cd2e6dda67037ca1ec4eb81fcc1ae112c SHA-256: a76555cc9ef327dcff13db9829a9d66591ab77970e79e4659e890fba9b30b9ea
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://cctraff.ru/strik?utm_term=girl+meets+texas+kiss'. This URL is likely used to lure users to a phishing or malware-hosting site. The ML classifier also flagged the PDF with high confidence, supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://cctraff.ru/strik?utm_term=girl+meets+texas+kiss In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f8985c0340f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f99eba8adc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5fbc327fea161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_5fbc41adb3d24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f9a0a8950f60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3df1c27-598f-4fb5-a892-53ee1256f6d0/download_red_cliff_2_blu_ray.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/avent_breast_pump_manual_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45066760-0ff6-4871-a21e-cf21f9322f1e/durga_saptashati_in_hindi_downlo.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/home_depot_sodastream.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/sobeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfbd73c-6aa0-42f7-85b7-76452d5ce7a1/44720277460.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/makakikoxebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e93905-6c6a-48e6-a2a7-ebaad9bf603b/sudewugobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b934c4-8857-4609-a17f-644818662720/que_necesitan_las_plantas_para_crecer.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2FD 4992 bytes
SHA-256: 6d9de43b5e8ffdcc674f827761ec49376d54c9282015f34073b428ac2ab887a0
font_01_sfnt_off000303e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303E5 9856 bytes
SHA-256: 3a21e34c997650a05bfa2ae15637252a9a44438a55ff6c32e7d603f4e8d99fd4

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