Malicious PDF — malware analysis report

Static analysis result for SHA-256 b403d822412d364e…

MALICIOUS

PDF

71.7 KB Created: 2021-02-05 01:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5addceb412a7ae6ec14078e6fb1c8f6f SHA-1: 1f857d22365743094243045b5d59f8ef29753b2e SHA-256: b403d822412d364e695c496473fac091a5863b72e5bdf93191fe45af98945c5b
186 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/123?utm_term=boyle%2527s+law+practice+problems+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/pidenali/0gcjfgf/12331293149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411683/normal_6009592b8d64d.pdfIn PDF document text
    • http://fefosawixamuwow.22web.org/harlequin_duck_hunting_guide_washington.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffa9a6ef0851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_600e76c4de0b7.pdfIn PDF document text
    • https://nobaloledajasom.weebly.com/uploads/1/3/2/6/132681012/6a19848dc29a.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/ifZighe/pugilawurapusimufeka.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/7uEhbih/booty_builder_machine_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/eqighih/gobulagox.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/punagilelabon/openfoam_user_guide_v6.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/sekonikinetosagivew.pdfIn PDF document text
    • http://xezujuwevan.epizy.com/nfl_live_streaming_apk_update.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/movies_anywhere_to_itunes.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/tricky_riddles_with_answers_in_spanish.pdfIn PDF document text
    • http://megutid.epizy.com/mufugetabifeloxilijatiraw.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_off0000d86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86B 5652 bytes
SHA-256: ea3678537dc2b4e8c6c105ec409d613a2a504768234ec56b74f023286eac8564
font_01_sfnt_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 10660 bytes
SHA-256: f326a8711034de6f318687891b295b0662db8a8dfd80dfd900d5801ecf5544a9