Malicious PDF — malware analysis report

Static analysis result for SHA-256 5351d8a29e5379c7…

MALICIOUS

PDF

66.2 KB Created: 2020-12-26 04:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b7a4d3f6838a05da3c251f29f1898f6b SHA-1: 91c5368e4e5bb8e00431205eac6ef0df93713307 SHA-256: 5351d8a29e5379c72b719e1862627030e3d8ad1c8d144b231c903175a996936b
154 Risk Score

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 0.9979

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/strik?utm_term=rust+colored+moth In PDF document text
    • https://ziwugedaxuz.weebly.com/uploads/1/3/4/5/134501511/734154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5fb5d13b9c5e1.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/7738793.pdfIn PDF document text
    • https://jedifubebevaze.weebly.com/uploads/1/3/4/8/134873515/gufarapixuvoxe_kujibapeni_xeligamibesokeg.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/mesevomu-zaganiledaruk-bezosigemetu.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/tiramun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fa56f39097e6.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/xajowu/agreement_of_sale_template_car.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/south_hill_library_spokane.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_off0000c996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC996 4976 bytes
SHA-256: 1736d5262b72f137cdaf9215faaf48bd6c84252bdf69021edfb2debdb07203fa
font_01_sfnt_off0000da58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA58 10088 bytes
SHA-256: 6193a6ac72a9643ed46e4684c8e6a53742b6a08e5749579d87967abdf7119671