Malicious PDF — malware analysis report

Static analysis result for SHA-256 a473ab5880f51d91…

MALICIOUS

PDF

77.9 KB Created: 2020-12-31 20:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf571cf0be245713a5bcb3c6ab9f790f SHA-1: 736a262f01abb68880263e08f1125616c6f7b963 SHA-256: a473ab5880f51d914057f08f854ec1bdbdb36d16449ac2ad1d8471b3da1c7025
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, traffking.ru, which is disguised as a search result. This indicates a phishing attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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://traffking.ru/123?utm_term=used+portable+dishwashers+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8fb762d144d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_5f9f5d356ddd2.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/2GjeoLW/54789794583.pdfIn PDF document text
    • https://cdn.sqhk.co/tememukafosu/jcgjjcw/xudogorikubexipenafevew.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/pibajuwi/28591746623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43d2467-9831-4915-936b-fe735c0a64c5/rubirezudepixizenewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4a0722-f37b-4ed7-813f-b0e111baa7ff/group_935_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087be42c-e689-49cc-a322-395140204068/76804402123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc16913-2d98-4266-a300-c2e1d4e0efa2/gildan_sweatshirt_color_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03de37e-dd4b-4fc4-a511-977f254087e4/25909558841.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/charge_sheet_online_telangana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14927873-e701-47b6-bdce-0dd25662d116/if_clause_type_0_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d792b14-8628-4b1b-8aed-5980a54a869f/31440327497.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/45819715906.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_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 5424 bytes
SHA-256: 202103f4348c26a2a9e80efa644cb97719f72d7b2728d2d65c472f966e0db6ff
font_01_sfnt_off0001076b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076B 10276 bytes
SHA-256: 4549b51ce0247f59c260fec042f2643c194fe02fa639287e906a0d919e2c9995

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