Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2017fadae45f843…

MALICIOUS

PDF

68.8 KB Created: 2021-02-19 10:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 53fdea811337bef2d036d4a96c60cfb0 SHA-1: 117ac6f095c8d0ab12bdb06ab1169995a8f72335 SHA-256: b2017fadae45f843afc879b4a145e6b0261b920bdbf20a61bb5001c59a641920
202 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
  • 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.
  • 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
  • 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://yafferge.ru/aws?utm_term=plot+diagram+template+with+definitions In PDF document text
    • http://whalesqpa.fun/customary_measurements_worksheets5yxt5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_6012bfe263716.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Libh9cC/wedirafiradulejiruweb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_60194b2adb0e4.pdfIn PDF document text
    • http://revershjtb.site/cinema_4d_r13_plugins_freeuamm4.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/jjjiM31/897637054.pdfIn PDF document text
    • https://cdn.sqhk.co/karewura/e3TUphh/22302906735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_602476e5c6721.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530036/normal_5fc70e01dfbaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lixejudazeza/fblghHF/flash_the_classic_helicopter_game_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5feb196de72b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5ffaf267ee62f.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/pivetuzadujo/brute_force_wifi_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/lakshmi_ganapathi_moola_mantra_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/selolusaxibos.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_off0000d1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B7 5548 bytes
SHA-256: b29a62eca1558153c8f2d4c30c3f2077287e4a4740e8c6e7249a7b4bb8d21c23
font_01_sfnt_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 10052 bytes
SHA-256: 10962ba8393e692e3fb8c10e15f1c8464d2ce44de2003806b769383feafd4956

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