Malicious PDF — malware analysis report

Static analysis result for SHA-256 054399dd3ba9203a…

MALICIOUS

PDF

69.3 KB Created: 2021-01-06 08:07:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8a40bae8c3add4b4223b54ea9e173120 SHA-1: 6dc5655d580e457f6fe96484cc0a5eaf1d470881 SHA-256: 054399dd3ba9203a049e6f349a2d5dd4a452f19f6595e05f68b9cac044e31bb6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'online games' and 'wkhtmltopdf', aligning with a lure for potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/123?utm_term=raze+1+hacked+online+games In PDF document text
    • https://cdn.sqhk.co/xusawikorut/AidYfga/12562257239.pdfIn PDF document text
    • https://cdn.sqhk.co/pigujoxexate/KHiiPhd/46994213320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5f9dc15416aff.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/dDJ2hd3/solar_power_plant_business_plan_ppt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_5fee0ffbdc4ed.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/fKjejjW/riwisipezunelejumireg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fe5a0936abd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425912/normal_5f9a01248bc1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5fdd1d79a2bf2.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/diejbif/muwezalujij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9137b85c1f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fcf329e09661.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/rerinago/sozobudosugisam.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/51548270901.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/pejobapokidirowuxujagum.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_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 5428 bytes
SHA-256: c4524f87efc62482de0a4fd34780e2d43bee1a945497910de3c6ec6b01c9b20c
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10304 bytes
SHA-256: 5ad5c9761d8eeabfaef6406e8708a73dffafbd319b07bf6a2d5809eab765fb2b

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