Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50cb020b5a2fd10…

MALICIOUS

PDF

75.0 KB Created: 2020-12-03 10:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4aaf7991a98c9fbb5a952e3a96d98491 SHA-1: 3bc3a009b2a60e15384c1608f00f210f10fb7585 SHA-256: d50cb020b5a2fd108b315d11b5ed2e8a0b2972dcacbb4c0d180e76f7bd87a3ff
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://trafftec.ru/strik?utm_term=ap+calculus+ab+multiple+choice+questions+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475203/normal_5fb7a985241a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6bf4244e997374a281700/t/5fc8a16db74dd54858dd646a/1606984046409/k12_student_email_login.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/33968049142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9312e93-36c5-4064-bc2d-18d8cb4655aa/37397827069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed79df4f-92f8-4fa8-95c8-a98e42926a65/zigurumemobilerijubun.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/dagepil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e01f2cf09257bd6be9c2/t/5fc1e5923f75b1664318e519/1606542739639/16606663134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24671c52-5b75-41ab-b5a4-9def1a1db52f/99371554153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015f0a61-8517-4341-a59f-9b08cb171a8f/taxazipekaxuda.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/portfolio_lighting_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/85915504902.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/tuwokojenotisesupudusi.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/bypass_2._0_apk_free.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_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 5520 bytes
SHA-256: 7ae1de6266ce3278be627f312f293172dded955725661cc388c77365efb584e9
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 10468 bytes
SHA-256: 6361098cf4cd7d2004d14551177d9608dc712ae76c7a5771ffffe9c4b649ec3c