Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cd7c0d9f2f7533…

MALICIOUS

PDF

64.3 KB Created: 2020-11-27 08:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5762cb3d5fa04b953d54248ee3fd41f3 SHA-1: c7ee7b60625a3ad93cec181f8d78940a1e19b400 SHA-256: c4cd7c0d9f2f7533690354769a851314513eeeda85e0b16c2049cb5dcd7a9d9d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, one of which is directly related to a search query for movie songs, suggesting a lure. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection indicate a phishing attempt to redirect users to potentially malicious content.

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/wb?keyword=kaala%20koothu%20movie%20songs%20%20masstamilan PDF link annotation
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/8433918.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/e1ad4eb23.pdfIn PDF document text
    • https://rijujofa.weebly.com/uploads/1/3/4/3/134323569/a7245dec752.pdfIn PDF document text
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/8172726.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_5fbc68a23d1d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fbb69831f893.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/1cc9be96-2a56-43cd-bd5e-7275e9b65753/notifufuzew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94c9596-4ebe-4c27-b459-12e512344206/37032109218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6858053c-8e0b-4c19-afb3-d54d6b6491a8/texodewewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1892456-3596-4995-a87d-1b2bb00f8fbd/lijabexov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a4b2a2-7f99-421a-8f03-3a4aa7ebd3a8/vutavozotikinawogipevem.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_off0000bee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE2 5096 bytes
SHA-256: e0156334f54198b807d5464775f6f5a4067bd9876fea07576c52ec8560f5d150
font_01_sfnt_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 10696 bytes
SHA-256: 4aef4249c6d2a822abe565ea3e23dcb57f1a3b65caed5f689f51f39766a2dbe9