Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef8c906bdb31778…

MALICIOUS

PDF

72.8 KB Created: 2021-02-13 20:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7e5cc69119fd398a9818fa1de086e700 SHA-1: 709928f27efcd69c6cfd88e9e6cb56c1c4ad4802 SHA-256: 7ef8c906bdb317788fcf78f363c6befdec536d5836d20d407e93d011c79c76aa
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://baarspo.ru/wix?keyword=realidades+3+capitulo+4+prueba+4-8+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466143/normal_600353300b9aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500677/normal_5fdeda5d1b1eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_5fd98e78e7048.pdfIn PDF document text
    • http://getallcreditscores.info/chalte_chalte_song_video_free4o7p8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5ff9ad24c3879.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/bkvQWhd/big_baby_dram_dog.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/dovulavavo/ketasafesawogo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/69020536060.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/dettol_disinfectant_wipes_safety_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/daripimanikabelad.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/2014_acura_rdx_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/couper_en_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/xiaomi_mi_9_se_update_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/jugebu.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/gagelinivebufumapakaf.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_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 5784 bytes
SHA-256: a11585a3ee505e736bfefd209558cc1b86c90ddb6947fc5e9236ad7324a6b579
font_01_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 11660 bytes
SHA-256: b19d13f19b506bd9b775abf42659fa6145d48752381909fac820de4527fa2d01