Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d57aeea1710124…

MALICIOUS

PDF

69.6 KB Created: 2021-01-04 07:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 61e03a80fabb7d7a92203564de1fcc7e SHA-1: 7ecbdc9aa3fa0e0f0f17bf21b13492ed76ccdfaa SHA-256: 00d57aeea1710124066f2bb10144071c55d396f4df323ff4367a44b9428a07c2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it is used to deliver a payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'working in groups 6th edition pdf' and 'wkhtmltopdf', likely a lure to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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
  • 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://trafficel.ru/123?utm_term=working+in+groups+6th+edition+pdf PDF link annotation
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/1a32a94a1efa.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/bqvieHq/how_to_go_dunes_village.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/gafedupeba/lucky_numbers_dream_guide_hollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/brighton_high_school_girls_soccer_utah.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/jixemibome.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/spider_man_game_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/21404373322.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/personal_trainer_website_template_wordpress.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_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 5292 bytes
SHA-256: f3e1a9c4ca2099d026fec4b4cb0bb8e9fdcda18598ff657a6c820d05fc68a7a1
font_01_sfnt_off0000e3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 11264 bytes
SHA-256: 4746e40906e13b1bb24d279561c199eaffaf9eaa5db54cab75da4eeae98a8c48

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