Malicious PDF — malware analysis report

Static analysis result for SHA-256 239120c6a6b7c831…

MALICIOUS

PDF

67.5 KB Created: 2020-11-12 17:45:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 48cc102981a0bab79a4889000e88de09 SHA-1: db250dd25d0bc39e555bc02f571b3e91eaa5670e SHA-256: 239120c6a6b7c8310d9c0ccec66108ba1b5d3464b43cf9a3ef695c24810d243b
104 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. It uses an urgency-based lure. 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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/123?utm_term=tab+and+slot+design PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f96625c37590.pdfIn PDF document text
    • https://kifobanirijo.weebly.com/uploads/1/3/4/5/134595275/3377392.pdfIn PDF document text
    • https://zejaxosadakawur.weebly.com/uploads/1/3/4/3/134372542/kogamumevakorimeped.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/6e2278e4-5cb6-4b30-ad05-4b85a650f863/wamaxagizubusinejeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78f0518-283b-408a-adc4-becd1722a8f9/allegiant_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4536507-fc98-4855-b1aa-5fa36d423292/24632014357.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169ecbb3-794e-4b5d-8a1b-ff4d84af86bb/tatamejuvomadubamafovuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66949aff-1973-42d6-b8ad-463d0156760a/pikasekenulelananefen.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/botetourt_county_courthouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ab4175e-f3f8-4e73-8c90-d481e3eff5d0/cat_ninja_unblocked_66_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24fa63c5-5d6e-4a5e-aeff-9591c0c906ad/91834254399.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_off0000cdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD2 4988 bytes
SHA-256: c0553d8afafb84c8301184eb14cbe18e5a2c5d36994e0ef7a8c76373f1543d11
font_01_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 10148 bytes
SHA-256: 31f5c8a9c1a7466c96b80d5af674d274fb7d6842e1e61587f0b5fa6ef1513533