Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a0f2753f003fbb…

MALICIOUS

PDF

67.8 KB Created: 2021-02-12 02:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8fcbd534a4d99c95a594c39d5104d7c5 SHA-1: 1327c8b7d14607c44a928bdf34eb421f5556c6ed SHA-256: 75a0f2753f003fbb2d52d670b3010dcfe438952818167290cee46d290062f187
254 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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/kusuf-zuvid-zadanidogudo.pdf.
  • 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.
  • 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://yafferge.ru/wix?keyword=plate+tectonics+worksheets+for+6th+grade In PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/kusuf-zuvid-zadanidogudo.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/icgjWZj/merge_wars_best_idle_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425924/normal_600883d964576.pdfIn PDF document text
    • http://polnews.xyz/94130431909bytud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446633/normal_6002f1e4af6f1.pdfIn PDF document text
    • https://zipegudedore.weebly.com/uploads/1/3/1/6/131636753/5841456.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/9hescyj/kits_club_de_cuervos_dream_league_soccer_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383574/normal_5fd3daf780fd8.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/darevako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fe0194d77b6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421366/normal_5ffcd8e077da4.pdfIn PDF document text
    • http://1yamal.space/88410824618vcbd.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/jezekemunidup/jirowixutazogofesukex.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/empyema_guideline.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/57923628269.pdfIn PDF document text
    • http://gegenig.epizy.com/34618111368.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_off0000cd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0E 5596 bytes
SHA-256: 02264cf9af62a4b4fcb285aa499d17bfef84a0935252434607ef5073b4815d6d
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 9828 bytes
SHA-256: cad12fa74b40bf56ecc344bc25677c72677a57895dbf074dfca676695616f09d

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