Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7084ebc0759df7…

MALICIOUS

PDF

57.5 KB Created: 2020-12-01 14:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6337d0cb3a6b1b9945dd3c934b695c6c SHA-1: 16d572e2d8e2babf9e4dab1619a06a2035e65bf6 SHA-256: 6a7084ebc0759df71a3a19d9409d32633a8cdc4a3eee64856f3ae881bb425998
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, which is designed to lead users to phishing or malware sites. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious intent as an 'escape room answer'. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://traffine.ru/strik?utm_term=escape+room+level+14+answer In PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/xomijediseku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_5fbaadec26f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fb4090a1a370.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/4535287.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/vasofirida/27500667808.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01425c6d96458361db408/t/5fc16d883570fb44d138849f/1606512008795/himalayan_guide_crossword.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57f93df132613bbdcadde/t/5fc6171f7acac6192a927cac/1606817568619/37341218251.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc134af61e25426e163d112/1606497455850/five_nights_at_chuckys_cheese_on_scratch.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_off0000a7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D1 5328 bytes
SHA-256: 249a533773d1283cc9fdcd6137662d74ea434b642a2e1e6f625a84dbc5c02261
font_01_sfnt_off0000ba01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA01 9312 bytes
SHA-256: 7f67caa29c35d18966511910ae39abcd0aa60e97760bdfcbf21384cb511e4890

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