Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bd83d960fc832c…

MALICIOUS

PDF

69.4 KB Created: 2021-02-06 08:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 56dc2c9369fb2bdbd250cbcd8476c13d SHA-1: 6b0a29d082beac5916896915c87ddfa2a88179b6 SHA-256: 41bd83d960fc832c0b1e3d26a57d99cb8d43838f2c1ddedeaeaec31c2d69e844
176 Risk Score

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://druttle.ru/wb?keyword=google%20assistant%20offline%20apk PDF link annotation
    • http://dodapim.22web.org/vonaw.pdfIn PDF document text
    • http://wipababotuzuke.iblogger.org/87830620014.pdfIn PDF document text
    • http://binadof.iblogger.org/fallout_4_enb_install_guide.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/jedadokuti/caching_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/uniden_bc75xlt_scanner_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/solitary_pulmonary_nodule_management_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/40035691607.pdfIn PDF document text
    • http://xesiduzivodugi.epizy.com/11194340177.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/sowezoxepokijojebeba.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/jexunepozux.pdfIn PDF document text
    • http://sudimomovaw.epizy.com/calendario_2019_mexico_con_dias_festivos.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/tabexojemaza.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/jifizonelemajesugumido.pdfIn PDF document text
    • http://merapuw.epizy.com/zegodi.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/25864353087.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_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 5068 bytes
SHA-256: 43546c51696a30bd5ea9c5452b9b2e05e618fb790609251155407a87b8f95933
font_01_sfnt_off0000e52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52D 10496 bytes
SHA-256: 47ba1c7a13a52d854da6eb66e1a034fe925e6cf4da251fb82e2eb189008a98fc