Malicious PDF — malware analysis report

Static analysis result for SHA-256 0550950c78492d8b…

MALICIOUS

PDF

71.2 KB Created: 2021-01-31 10:20:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f27b072c38adee7970bd5db3ac679642 SHA-1: ba9b6a0ffed8b74c4dfa723168e51530317f7f51 SHA-256: 0550950c78492d8bf6ff30951e7b9b4b47f26066cfd4d11b6f3e1b53e3680784
196 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://bologen.ru/wb?keyword=ultimate%20dragon%20simulator%20mod%20apk%20free%20download PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/jdh17c7/gatav.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/ifhdAii/hello_zombie_apk_download_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/jegche6/the_king_of_chess.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/GTgGQha/td_bank_us_account_in_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcef78faa887.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/aidijhg/black_friday_2020_deals_target.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/ihhfdia/off_road_army_truck.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/Rjirowr/14278494519.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hikjchh/12017443225.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/4142071.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/xggheij/word_crossy_cheats_level_911.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/WSgjvYV/anime_3d_live_wallpaper_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/HOEVhd4/jatuzup.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/jfjcOih/54808551542.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/2jc8Jhj/53397497413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 5508 bytes
SHA-256: 31a3300c230d3d11f579ed0c40d84dbd2e4dfa051da60c235b136c91cf629bbd
font_01_sfnt_off0000dc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC90 15828 bytes
SHA-256: b752bae7805d3c45a6a313c8fd252d720d9f8d25d24dbe008da6cac328994b75