Malicious PDF — malware analysis report

Static analysis result for SHA-256 27da0b486fdc35c7…

MALICIOUS

PDF

62.8 KB Created: 2021-02-09 23:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f3834ee0747460fd0d216e760646af0e SHA-1: 1ed2b4e7831ec4db80268e693b575ec7d51aaa3e SHA-256: 27da0b486fdc35c791ed5f6d45c1c49121ffdbd9e96056ac5ad3ba929c65cada
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=supply+demand+curve+worksheet PDF link annotation
    • https://cdn.sqhk.co/bosesegivu/EzgiR9B/ravensburger_3d_puzzle_night_edition_statue_of_liberty.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451971/normal_5fdf7b7cc110e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465270/normal_5fe439b7dd5fb.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/aPjhUgf/dancing_road_color_ball_run_review.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/ganubifirigevi/muzzle_flash_free_imovie.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/pes_2019_smoke_patch_19._2.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/ulcerative_colitis_guidelines_nice.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/zuzalezajepisozedekovob.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/kajupedipadobi.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/60850971421.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/dbz_goku_vs_super_android_17.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/algebra_1_worksheet_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/english_language_proficiency_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/frequency_histogram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/98786999355.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_off0000b8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B1 5732 bytes
SHA-256: f66832ba7d81a48b7bb8f08b028857bc8330dddee2b9b73db6874118f5fb236f
font_01_sfnt_off0000cc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC24 10068 bytes
SHA-256: 555e9c48ea36aae8cb0dff4b46f2013f4bc286a08aae17865f4de06c87b43784