Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd760b62133663bc…

MALICIOUS

PDF

68.0 KB Created: 2020-12-17 20:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8b078f3907f0c43b711017b1d60bf612 SHA-1: e209c0c01d76d38979ccc939abe6d1b9dae76c0c SHA-256: dd760b62133663bcf51b6970f2685cd2ed6d17085c307e44b9b5ee54fc95f2b5
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=banjo+kazooie+nuts+and+bolts'. The document body, though heavily obfuscated, suggests a lure related to 'Banjo kazooie nuts and bolts', likely to trick users into clicking the malicious link. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=banjo+kazooie+nuts+and+bolts In PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/rabipumel-jadavura-figurud.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/fatepop-sunusuzom-segolatulowinin-nuteniwu.pdfIn PDF document text
    • https://doxediseweroz.weebly.com/uploads/1/3/4/6/134634010/514578.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/xolixomiwasamu-pusap-fumazor-tolenuxeseb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5532b4c-389a-4479-b816-ba64bd16887f/uga_watermelon_production_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/92752642299.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/14199724932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdadccf-b3ad-44bc-ac3d-6c625635d316/sunilapuwojegojoxabi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f06b104edf1d7780fa74/t/5fc155515147b14804651f11/1606505813536/converting_celsius_to_fahrenheit_practice_worksheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc0df33f3de5e49b584a377/1606475572745/zasikuwubuzepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c00ef1-4a6f-4c15-a45c-f01a86c7fcaa/tagojunulamuxepekujinar.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/76554816560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d8dc69-21c3-4d10-81d3-d70ca5225398/67344515103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ddb8a7-5042-4e55-b499-3a023e4f6c6a/41218397909.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_off0000ce7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7F 5104 bytes
SHA-256: 3d1d6b77ddde17c996cb1f17f84aec23b7eb2754b56d7f6fa8e662f628e17b75
font_01_sfnt_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 10416 bytes
SHA-256: 64cb2d2b2e73cca4a9257fe700a97931862cac7a5d93f77a06bf397f741f450a

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