Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b0a512c9c8f2a1…

MALICIOUS

PDF

69.0 KB Created: 2020-11-18 20:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9626b74a2d2bea5ec1392cb418be1fb2 SHA-1: de793736f8287d5e5364f4d8ae666c7c5703d663 SHA-256: 91b0a512c9c8f2a1f3bd815ef772fb7712135030b6587b781196433dff6bf96e
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=kindle+fire+hd8+7th+generation+manual PDF link annotation
    • https://zirenujunez.weebly.com/uploads/1/3/4/4/134431605/5628ecfe21e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5fae190566d68.pdfIn PDF document text
    • https://fipiwodumuxi.weebly.com/uploads/1/3/1/4/131453050/263d6d82907c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5f90d0bc14806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_5fa5a821b24f4.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/26c5b98b-a8a5-4fdf-a32a-853bac089427/scopes_manual_8742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca77b54-257e-4d13-8ebe-ad5608ac1a3d/84297471359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a7bf80-d8c2-4c31-bbe9-a684d64958c9/21844178261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6a5efc-9041-4035-808f-63d803fdfb97/patugev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8392cc-1f31-41eb-8e83-728dad8eb6a7/rofijonowofilobufexorar.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/juwawanowazejibew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7a067c-d43a-4d0a-a3c1-5ce113c35b69/sizaxonoravojobuguleda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230130c3-66cc-44c7-990a-230a3403bd1e/76722006355.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_off0000d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22B 5388 bytes
SHA-256: c8b1a719d92524de7cdc4b52055aacb9b62cd8a0eff801b880f90013257f8ca7
font_01_sfnt_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 10152 bytes
SHA-256: fe9889b967c68b1f81e430f314a18260ef454cd086b12730b19d835065a703a0