Malicious PDF — malware analysis report

Static analysis result for SHA-256 36742cac51f45ea1…

MALICIOUS

PDF

71.7 KB Created: 2020-12-14 15:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6333a6f04c34d2af62f0622b381a8ebf SHA-1: d21a1e95f59d1f181763dd66d375aab634758605 SHA-256: 36742cac51f45ea126811dcbf51b8fd3ae6670454d55c06455edda6ddb95dc17
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://cctraff.ru/strik?utm_term=5e+purple+dragon+knight+build In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/gapovowumepekegosiza.pdfIn PDF document text
    • https://walupufodurutos.weebly.com/uploads/1/3/4/7/134734499/xudifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fc3984d4f983757204e3eac/1606654031562/64185460766.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfb2312cf09257bd651d14/t/5fcd32abf94b6402b22498f8/1607283371672/free_online_forex_trading_course_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/68578469231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd24c6d2-62e2-491f-ad9d-8ede274691ef/the_lion_the_witch_and_the_wardrobe_chapters_15-17.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/edible_printed_icing_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d035929-339c-4422-8ddf-f6325f121339/sebasuvojonibodalosuzekir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0a8c72f8b574a0f52228/1606224524488/asme_ix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf613b7a66e04eaf42d34/1606219283452/36626517658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cdd6d0-8b83-436b-beb3-79029c598ff6/98890260104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73743b9b-9b63-46be-8ff4-74cefff4cce4/51181315786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b9561b-b902-4edb-b190-62edc2d15e54/rip_van_winkle_sparknotes_summary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aa17e2fce462bcac6d6a/t/5fcc333cc00f007ceada54b8/1607217980703/best_free_voice_changer_app_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d95bbdb33045eee4110e/t/5fc635e07acac6192a9591c1/1606825443782/kof_98_um_ol_hack_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/14218089390.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/kepamefaxirizapigederuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/parallel_and_perpendicular_equations_worksheet.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_off0000ddf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 5276 bytes
SHA-256: 997e503a44ef2c121308bd67d0ff336e3fa00dd7724e8eb71af41ef8bd4b35af
font_01_sfnt_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 9968 bytes
SHA-256: ac805aa6e8a114d7572a2b6deefbe8c028499691ad64f2d488c45ae34ad7f3bd