Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be51b3b84fa384a…

MALICIOUS

PDF

67.0 KB Created: 2020-12-21 22:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 038ae5125542386abbd11f5f1449800b SHA-1: b9b3d05ddb57b2792fb11046d749640c7e4c3ed9 SHA-256: 6be51b3b84fa384ac21e4ff75220b7a5cd26a826a9b5ad64f11bba1dbbd833d9
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'cross road car crash'. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent to redirect the user to a harmful 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
  • 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://traffnew.ru/strik?utm_term=cross+road+car+crash PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/57983481024.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/full_marks_tamil_guide_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/fundraising_thank_you_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29729405d5340f33472fa/t/5fc55eb4bc819f1cf48c3a2a/1606770361042/38344574020.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/solidworks_tutorial_sheet_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/outline_of_luke_s_gospel_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/burger_tycoon_unblocked_games_77.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/71747906524.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/jevufumek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c57473-2bb0-4726-a92c-e0c657627486/17119501235.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/cat_420e_backhoe_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/wizedifaf.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_off0000cb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB16 4900 bytes
SHA-256: d5d9c5f2ea7469717676987b17744018853514bd3064c2821461ee5da0ea835c
font_01_sfnt_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 10612 bytes
SHA-256: 252d226b6d1850d721feb00125348b11b62aab24d40a9cf9fa04f64eecda0646

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