Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3acffe586e7bae6…

MALICIOUS

PDF

65.7 KB Created: 2020-12-17 05:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 22cafed1fd92144ef0a169dd050c3bed SHA-1: 796ca70e6452ecf84cc3f02eec1dbe84a912c008 SHA-256: d3acffe586e7bae6e2ae59ed68d4f7948678c168fe425d39fff1acca9d6e7262
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=ncea+convention+2020'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, contains text related to 'Ncea convention 2020', suggesting a lure. The primary attack vector is likely spearphishing attachment, leading to redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=ncea+convention+2020 In PDF document text
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/sitimijumasil.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/8395542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5fce10aaf120f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472760/normal_5fafec456d42d.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/4145630.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/bipepezuwed/establishing_your_birthrights_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d76220-5b57-469e-9e6b-76936423b2a2/57630671153.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/design_neon_box.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/99770233533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfd25d5-eb0f-4f61-a6b7-4e4dbf107096/84855655906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eed3951-52f5-450c-aa38-ab781f30632f/antecubital_area_of_arm.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/56690299099.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_off0000c647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC647 4788 bytes
SHA-256: b9c616566a7b7a539e3768961c7144ddd4497a331a76c0fcd59b07d448b008e4
font_01_sfnt_off0000d6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B4 10640 bytes
SHA-256: 3c8d690505f02b79e1aad8112ecece37aa23aff142ece5b966c4a739c4246cc4

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