Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42e66abdbb5c1f2…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 01:05:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 213aac903c9266c79684fe39a6c6f9bc SHA-1: ea8af2f36ff8a66a941da665e9b311fd213367fb SHA-256: c42e66abdbb5c1f2dc8ea073225ebbbc837aab7290575bb74d33928c55346ff6
196 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.
  • 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/award?keyword=what%2527s+a+hard+return+in+word PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5fc776c52f21d.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/bumibobu_safaparavorowep.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/cYm2W0B/bixubaxagegenapiz.pdfIn PDF document text
    • http://forkidsshop.online/bopumafuselesasaa6dw4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5ffd31cfe0fc1.pdfIn PDF document text
    • http://shoop-ft.ru/wepejuvaxakelawisuzuxofuob2hz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377125/normal_5fce979114966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_603090776376e.pdfIn PDF document text
    • http://sayfelengs.space/pinnacle_studio_23_user_guidesg9ja.pdfIn PDF document text
    • http://itayoga.space/the_chaser_full_movie_dual_audioli78g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461234/normal_600da6721aa22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ffdcd2af2a70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366959/normal_5fe346a436f67.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/chhbhiY/cupcake_recipes_lemon_and_poppy_seed.pdfIn PDF document text
    • https://cdn.sqhk.co/selugijibix/midOgjT/99536162187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fdc2671ecad4.pdfIn PDF document text
    • https://referozudu.weebly.com/uploads/1/3/0/7/130775612/nikeledolamajaj_wokazeduvam.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/nosepevozux/kudumowiminovamepo.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/satebamexapanuk.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_off0000df97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF97 5020 bytes
SHA-256: 39d829f2621fe8b62538ec169e21aefdf1eb4e71de15bbe097adeb2a9f027a96
font_01_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 10556 bytes
SHA-256: 4fc442246575fdad5dd419036ba6e2e6333ddb62e60cb89aa1e4258fcd9d27c0