Malicious PDF — malware analysis report

Static analysis result for SHA-256 a851ca65c9e7866c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-25 02:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d3db8c342c6b89688411b476eba2d7d SHA-1: e4b5054ee744eb613bc25bad7f3ad36f669df3fc SHA-256: a851ca65c9e7866cefa7939dddb72247a80b4b8ebcc6bfd4a4d0f265a3a9a67e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 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.
  • 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://crophysi.ru/wix?keyword=140.6+miles+to+km In PDF document text
    • https://cdn.sqhk.co/jumupebuvi/bsjb97r/fotogutofuselowovigor.pdfIn PDF document text
    • http://tendernes.ru/devoxumezojodonetewugakurhg26.pdfIn PDF document text
    • http://in-step.shop/fluke_primalert_106hgpz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_6024293be202c.pdfIn PDF document text
    • http://detonic-official.website/9734355873qytx8.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/jiiheic/zimevoluwizawigifolekurat.pdfIn PDF document text
    • http://roflan.site/rimepamogediwatowm6rfs.pdfIn PDF document text
    • http://xivitej.66ghz.com/marathi_aarti_sangrah_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391315/normal_5fff0f60bdbe0.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/iarjahd/mechanical_engineering_technology_vs_mechanical_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/jhifTWP/33285945121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonizeza.epizy.com/38600334424.pdfIn PDF document text
    • http://sejedusodumevu.epizy.com/benim_hocam_ayt_matematik_kitab.pdfIn PDF document text
    • http://tosizufokora.epizy.com/hd_anime_wallpapers_1080p_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/website_development_quote_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/vesijatetu.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/detective_chinatown_full_movie.pdfIn PDF document text
    • http://sajipesexadagon.epizy.com/29618794881.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/76723455451.pdfIn PDF document text
    • http://japixunatavaxi.rf.gd/bakery_story_mod_apk_revdl.pdfIn PDF document text
    • http://zapesuxeliribi.rf.gd/macrumors_buyer_s_guide_apple_watch.pdfIn PDF document text
    • http://foweroboxufafuv.epizy.com/cardiogenic_shock.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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 4964 bytes
SHA-256: a1250edef41c199cab87e8dc72766611a79524ce8f5a10fb1b577d2e7d5365ae
font_01_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 10340 bytes
SHA-256: 8a5168aa241d8bac65ee763fd39e3f359ad9f0a075344f59e75db4d6c337c222

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