Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee0063c2f8eb6b1…

MALICIOUS

PDF

61.9 KB Created: 2020-12-24 11:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a446566adabe575af28ad8a9467cae60 SHA-1: e7f17beb86e161d01b58d1bd5f0507b22aa21f6f SHA-256: dee0063c2f8eb6b1fb7c9bfc4a686fca89495778ded4e2971204ebb84cfbb276
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to a crossword puzzle. The presence of embedded URLs and the critical heuristic firing for a malicious redirector strongly suggest this file is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/123?utm_term=president+who+won+all+50+states+crossword+puzzle+answers In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495976/normal_5fe388f50525f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f8e84a27f9d3.pdfIn PDF document text
    • https://cdn.sqhk.co/waximanodif/bPvjbO4/image_editing_tool_for_passport_photo.pdfIn PDF document text
    • https://cdn.sqhk.co/bakavaxa/hdihXjc/56242463245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fd6737f4b299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_5f9e88e966a08.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/jhXijic/kajiwoto_ai_companion_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/ihUi8jj/lojiragimoxowufefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384828/normal_5fbcbff59dcf0.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/jamokaroxoj/tanudap.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/sample_neurological_assessment_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a317179-41b9-48da-a1c4-ec72d28258fb/dotafopugaxuxalil.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_off0000b504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB504 5572 bytes
SHA-256: 49d3a0307a453734185cea99d31786a8dc3218faddd54433e0fe3231058a0859
font_01_sfnt_off0000c80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80D 10132 bytes
SHA-256: 272a2f6c90f5b15b402bed02f843f90e5339b055d18a995f1b260f6a6a751c43