Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6a2e0672834f42…

MALICIOUS

PDF

68.9 KB Created: 2021-02-24 18:41:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0c2d63d11f3e2bbb04dd5c3760973836 SHA-1: 0e533303fa2890837f38d28c2668a88548cb64ef SHA-256: de6a2e0672834f4289950e81f02fffab0f263aa40f5bdc37336ff20d0d548976
194 Risk Score

Malware Insights

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

This PDF file contains a lure related to car title loans, directing users to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL is a known redirector, suggesting it's part of a chain to deliver a payload or conduct further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=car+title+loans+tulsa+oklahoma In PDF document text
    • http://panixatexoxureb.22web.org/gutesebipejabifiwoboniruk.pdfIn PDF document text
    • http://tupuwuwegidava.22web.org/zegek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463825/normal_5fd64b156dd35.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/8Adjh7N/24083927104.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/ogezzcx/35672755388.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/3jdhaDc/download_game_alien_shooter_lost_city_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486033/normal_6003eaaf5089f.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/gE9ifjc/huawei_health_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/hhgwhcH/lerirupovapuxomutotevo.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/gfnhgkG/gapuxumalovegaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabojiterakan.rf.gd/how_do_you_troubleshoot_a_kenmore_microwave.pdfIn PDF document text
    • http://gazezubutajon.rf.gd/medical_report_format_for_visa.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_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 4896 bytes
SHA-256: d76ad7841acba3e043d5e60abc312f31046dd2444ab5081de9c08442b758cec7
font_01_sfnt_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 10212 bytes
SHA-256: 03409f035eff1952aa9f98b35dfa12f4b4360a1ee6b3a125e1303c19669618c4

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