Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd1f4c89211b57d…

MALICIOUS

PDF

72.9 KB Created: 2020-11-18 11:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1d6eb0e8d3b0dc4028058b07087e01f7 SHA-1: 1ef066dd251497969679323ce18aedad68c50ee4 SHA-256: 2dd1f4c89211b57d0023c5182c016c9b0c0981302320eee2f9f226a08dbdf33b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary IOC is the malicious URL identified by this heuristic. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving a redirect to a phishing or malware download page.

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
  • 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=honkai+impact+3+abyss+guide In PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/vonesagopozajobivo.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/bifopu_jizegizosexodaw_silivozuwibu.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/2f710920.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/wazagidonux/24463208410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc024a62-bb6d-41ba-b2e5-881c318288b2/14683690607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa5aec1-7c46-4a47-baf0-4ecf7944f9a5/cyberpunk_red_4chan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c68547-fa55-446d-b30f-f4dbf6282060/darivuko.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/medosekisumotusukoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/slope_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/unchained_melody_saxophone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/step_academy_jmc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f957f1-fa66-4846-a62f-9d560f7700df/16631923360.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/30511159798.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/iupac_nomenclature_worksheet_for_class_10.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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 5696 bytes
SHA-256: c10c3982b711c64f5a3ce707e1ff6698c8df4552cd4b3452d2ac178465aa7ac3
font_01_sfnt_off0000f24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 10648 bytes
SHA-256: f88141f024188c7b608cba2e543d5c8a19c9f038fb6c4063359df091e35586e8

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