Malicious PDF — malware analysis report

Static analysis result for SHA-256 c138aefb23e729d1…

MALICIOUS

PDF

63.6 KB Created: 2020-12-07 02:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 010e2ea463e2fd49c8cfea15c08c4177 SHA-1: d71b31d6b94e83591a2ab4a013ca536ff0929436 SHA-256: c138aefb23e729d1759aa57c686714bf2a7b3445d7715b121818cce6f1166324
96 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 embeds external URLs that direct users to attacker-controlled resources. 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=gumball+and+darwin+drawing PDF link annotation
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/sabokuvetafurufojoje.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/pisilom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5fc77502dab7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383929/normal_5fb7919a6cddb.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/b1c9f64e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485942/normal_5fb9f9fa6fd48.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/c1f8bf11-8a89-4b83-b8ac-916e510a06ba/zikoripafomasomo.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/body_mass_index_chart_in_kg.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/niromimixabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/698275e0-eb66-46d7-bf54-6f5c926e9513/sabepidov.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/dilenufef.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_off0000be95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE95 5232 bytes
SHA-256: 21f489123c4f0e30737caeb92e8489882d5357901df35ef2e2415177b3616a1d
font_01_sfnt_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 9836 bytes
SHA-256: 1e5db8525611fe2ff476c6827f78294366f3d19c546ef15c3d8402dea91803e0