Malicious PDF — malware analysis report

Static analysis result for SHA-256 8495722d5a8589ea…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 22:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92f9a2cee59f4ac83ba2d02e176ed2e6 SHA-1: 5fa30f7b68cc32a9e2b5c119fb5b7d3363e4b550 SHA-256: 8495722d5a8589ea1e1f02d496d31200e7878b7df35dccc1c697d8f64d79b2ee
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://pelibifir.ru/award?keyword=2007+chevy+impala+trouble+starting PDF link annotation
    • http://lojapidabud.mypressonline.com/how_to_solve_area_and_perimeter_of_compound_shapes.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/jicjBgc/cannon_shoot_game.pdfIn PDF document text
    • http://kvyovk.xyz/jechoota_beektotaa4g796.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/95826117170.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/46550835488.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/kimeja.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/Fiejggc/best_car_race_games_ps4.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/97408541535.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/viwululu.pdfIn PDF document text
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/87aaadd5851ed.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hhrSjaZ/mufovukefurusuvegawaxe.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/vufupu/chronometer_android_milliseconds.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/lipagugefova.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/19808618686.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/94461396935.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/horwath_hotel_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/19624527488.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/misujuvute.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_off0000dace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 5908 bytes
SHA-256: d05f768ce59cf3efae23bdfc89bc060b8789a3cfce9cdcbca68f916a22057049
font_01_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 10088 bytes
SHA-256: bf3dd0f17d0253c6887c33ca21a9ee76b76d7f0798435c9316d0f18ff94aab27

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