Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6c43d04b38d933…

MALICIOUS

PDF

79.1 KB Created: 2021-02-06 17:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 42891ceb95823af5d106eafac8b0425b SHA-1: d640d71c21869e88cb546333099ac828ad160d81 SHA-256: 2e6c43d04b38d933e6ea1a2e27642be061830afc158289219e7ee0559bf7966f
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/aws?utm_term=hemorrhagic+shock+guidelines+2019 PDF link annotation
    • https://tabekemaw.weebly.com/uploads/1/3/0/8/130874329/2319499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411931/normal_6001714811028.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/wjeW8Mj/among_us_character_colors_transparent.pdfIn PDF document text
    • https://cdn.sqhk.co/lozukoxokir/h4hd82O/mtg_tournament_schedule_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/g9iaWjc/vunojepa.pdfIn PDF document text
    • https://cdn.sqhk.co/sepetuvab/chibAar/world_war_ii_battlefield_the_duty_called.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/woriw.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/FeVtKgj/92876311346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_5fd949ad452f1.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/bL6oqQt/81421149619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fe9d2201a12c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_60066c56a21f7.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/3ghjghd/3202060953.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501509/normal_5ff5f01735f76.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/gdihthh/39813393924.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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 5860 bytes
SHA-256: 6d19b02229120c09facd4b82a2597598e965268dee176af9d99f2c0803de6975
font_01_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 16304 bytes
SHA-256: 52d3e78bbd4e784b0ecf172e7e51d13f3c314ff0188ec56dae665be4f92d8c7a