Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c5149bdf4b277e…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 21:14:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 44f70fb2508055f40fe9edc9d245c2bf SHA-1: ff7b47e2142fbd373f2c95471a68b97a6e13943a SHA-256: 02c5149bdf4b277e6695c94a2f25d71acd2fde13978ec51e4cdf7d812c49d6bd
144 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Burger King breakfast deals' and an embedded URI pointing to 'xajibur.ru'. Heuristics indicate this is an SEO redirector used for phishing, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The ML classifier also flagged it with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/award?keyword=burger+king+breakfast+deals+november+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381321/normal_601fae1e280a6.pdfIn PDF document text
    • https://cdn.sqhk.co/tosijoxopum/0Sib2Fo/wupidenudomigewabuzaza.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/shfbjdC/word_wars_cheat_screenshot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_6035194fa8e8f.pdfIn PDF document text
    • http://rukusifokib.22web.org/ravixedulurulope.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/ahhhaic/judomafitojupi.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/cCgerME/country_music_charts_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/haDBzq7/48117603500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450354/normal_5ff57e72069e9.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/j0idUO1/tanks_2_player_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_600bd94ba1896.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/ihicjhZ/lezewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/sogur.pdfIn PDF document text
    • http://rifesos.epizy.com/kaxixowojakopeg.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/25863407657.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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 5812 bytes
SHA-256: 117475d537085e2c015b631cdbd637cdb19c9346651649daa7e8cdfb60a3c0bf
font_01_sfnt_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 10648 bytes
SHA-256: f412ebee1d2d1e6dbca722d6c6fd49ce2c9f98ec529e173849e2f09c8f0425d7

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