Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffcf6d97a029b82…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 19:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ae83b4d230c22cc2d3caea3a8e964eb5 SHA-1: a4df21f529a22174cd8c9233c4259ecea189ffc1 SHA-256: bffcf6d97a029b8221b2cab942a94e799f595a34e8c34ff27fe99cd4a3a94422
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/wix?keyword=aldo+women%2527s+shoes+size+guide In PDF document text
    • https://cdn.sqhk.co/jepipovi/hcjjztI/hola_music_laptop_stand.pdfIn PDF document text
    • http://instapriz24.online/surfboard_master_mod_apk_unlimited_moneydq7ix.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/10Qgfhe/marvel_comics_museum_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/eqMSgfB/zodebomipevutisigi.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/qWigGhe/30034479884.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/gJdjfid/8608316274.pdfIn PDF document text
    • http://rajedat.iblogger.org/kasexozerobuwawoni.pdfIn PDF document text
    • http://savigekefove.iblogger.org/spectrum_analyzer_software.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/Wje2Wbk/poker_offline_zmist_games.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/hbZrgiG/savowexujesilixaxon.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/zuguvoxoki/16631942054.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/present_progressive_tense_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/java_stringbuilder_vs_string._format_performance.pdfIn PDF document text
    • http://zebofazedixa.rf.gd/68276187149.pdfIn PDF document text
    • http://vuropomap.epizy.com/invoice_template_freelance_translator.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_off0000d01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01B 5096 bytes
SHA-256: 7e833d8b4d2f34566912691cf8e8a3b5a7a81c89c5d10a6c4d5fb39d5b1e72cc
font_01_sfnt_off0000e16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 12668 bytes
SHA-256: bb84c783804fd95c1c8400bc9f29381a46f75a4eb4cf475f2d098e88f77b2a1b