Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf96db6bd82cb70…

MALICIOUS

PDF

71.3 KB Created: 2021-02-22 11:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b48cd33f02a60b158aec69b080b67622 SHA-1: 405076188f7f8397fdac62b7e09f60255a3904e7 SHA-256: 7cf96db6bd82cb7059fff4996cac563fdffb182eec058538d84385a6bdf6e40a
196 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
  • 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://maypoin.ru/wix?keyword=ancient+egypt+mummification+worksheet+pdf PDF link annotation
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/wijojavexowiwosom.pdfIn PDF document text
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/xexapamusavelujid.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/cbghgj4/wow_amazing_deals_atchison_ks.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/fijol_rogezejozafawan_vutatofonor_wurexotafu.pdfIn PDF document text
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/guxenuduwo.pdfIn PDF document text
    • http://nevogixire.22web.org/sizogakisesepenijifapa.pdfIn PDF document text
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/fdc778b41a108.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/wShc86c/modern_age_president_simulator_mod_apk.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/rolam_bominopu.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/hbeoku0/wallpaper_4k_pro_players_fire_free.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/5105977.pdfIn PDF document text
    • https://gafeziluwer.weebly.com/uploads/1/3/4/3/134310472/birexusuju-rizovira.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/rawesaragegugar/self_appraisal_answers_for_employee.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/vegan_stuffing_recipe_for_thanksgiving.pdfIn PDF document text
    • http://sasaroguri.rf.gd/88544043827.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/28481538475.pdfIn PDF document text
    • http://gefuxexo.epizy.com/devi_bhagavatam_telugu_book_online.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/65603073726.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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 5784 bytes
SHA-256: 3a8394797f1a8f4c6e050ae05c49f1bfb1207371afece430abdbc538bbdfb8f7
font_01_sfnt_off0000eb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 10148 bytes
SHA-256: 41c36cb181e24c2355b06f037dd38309e169be756aea12d390633ebd3cd3130f