Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c3be58933e65e69…

MALICIOUS

PDF

74.6 KB Created: 2021-01-01 01:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3551c1e4e85634ef4461fa3a1379da1e SHA-1: 1f7d013ff57765a1242105f343f5a9e2b3f31746 SHA-256: 5c3be58933e65e6968bf2456ecf99d74a4fbac61320a78eaada2405021f6ceab
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 0.9998

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=commuter+bike+tyres In PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_5fbc5fa9999c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529087/normal_5fc946129216a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_5fedb0692352e.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/MHjduQ8/account_strategist_job_description.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fbe29919b071.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/eac7521040ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9cccf016214.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/48e94d25-6fbe-4b49-b2c9-6bbcfe143a38/shes_come_undone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/katy_perry_bon_appetit_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/gamitixoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9b80d7-39cd-49e2-830c-785824d607da/the_apache_tribe_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99bdb0e0-1144-4351-8bbf-a40b511938d7/13870658699.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 4800 bytes
SHA-256: fc83840404e2f32063e2a358e2c1c72e8d3c437db112fa5333e798e71e835436
font_01_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 9964 bytes
SHA-256: 966aa8c69a47d3524ff1aea223aeadba2af8bc03facb171a1c5052f2ddb8cc9c