Malicious PDF — malware analysis report

Static analysis result for SHA-256 74137e3779804072…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 19:14:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0e129b4da14c67da2cd4825e9a97ca58 SHA-1: 8885597a8359cf7d699dbb642226d6c6262f2814 SHA-256: 74137e37798040721dd1352ebd57f41c08abf3cd4106460e06b51b66a9d9549f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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=sample+letter+of+dissolution+of+corporation In PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/wajagumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371536/normal_6009a66fb9ca2.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/NCqFifv/27710529602.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/ighjdha/religion_in_china_percentage.pdfIn PDF document text
    • https://cdn.sqhk.co/kotoweraga/zIicbge/50_nursery_rhyme_video_free_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/ig1jfjb/number_photo_collage_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/hfiij0B/crunchyroll_download_pc_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/zelagagunogo/dahaier/marvel_contest_of_champions_tier_list_november_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/MgiIloi/nba_2k20_player_ratings_all_time.pdfIn PDF document text
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/dumagodul.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/jje6gjJ/temovikunajukinisotujine.pdfIn PDF document text
    • https://jomupalekiloja.weebly.com/uploads/1/3/4/3/134310494/lomiv_durevujap_zutupawafisi_vominoge.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/ditiruz/jinja_template_iterate_through_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/consumers_report_best_car_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/open_court_phonics_worksheets_first_grade.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_off0000da6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6A 5404 bytes
SHA-256: 1eab5dfce47b9562632292b2dd151d33258f29f35531c324d2b8b4d4d9c3201e
font_01_sfnt_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 10068 bytes
SHA-256: 30f1eac7b3dabb750e9ed1cee5dc5f6bc6e5b550e7066d907fdc3b9a7d38bf52

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