Malicious PDF — malware analysis report

Static analysis result for SHA-256 3802203ca7268c48…

MALICIOUS

PDF

68.3 KB Created: 2020-12-21 02:10:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 12dbb5be6ae18ca2ba4eda5ee4dca138 SHA-1: d5e436f514ab3546cd277c974ead5bc12a6146e0 SHA-256: 3802203ca7268c48295bfdc4ad8436cb29ec9bb9a94a1f8ec88aad2ff92e9871
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was detected as malicious by a ML classifier and ClamAV, specifically identified as a phishing trojan. Heuristics indicate a social engineering lure to install a browser extension or update, a common method for credential theft or malware installation. The embedded URL likely serves as a redirect to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffnew.ru/aws?utm_term=360+antivirus+app++for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482407/normal_5fca2c5b8490f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5faf0b493c135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_5fc46d6e9152c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5fa31a97d3ef0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5fce85f2c827e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_5fc22b333fc5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_5fa049f689442.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5fcefd11b7577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_5fbb2bd5e24f7.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/zafaronivaj/doctors_note_template_uk_nhs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd486d1091525336533171/t/5fde61c62629b066abb428e2/1608409542736/nanikajogofopodivuzab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af574d0c-6e45-48fa-9f53-cf6b958b19e0/stardew_valley_ocean_fish_bundle.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_off0000cdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB2 5400 bytes
SHA-256: a365aeb4e594e580fabfbc82467328d418c44fcc91978eb066dc23ca59fb9087
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 10816 bytes
SHA-256: b18127d4963bd904003b9a3924f7fe278035da3fdb376683730ad521393c6cd8

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