Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd5de9e29ee332f…

MALICIOUS

PDF

66.7 KB Created: 2021-02-18 21:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5aec4c415039dd10472a242931e44913 SHA-1: fd8b9171efd88ffcfa495dbe4b5353fca12da94d SHA-256: bcd5de9e29ee332f6e3212aa8d21c81ac055908a57af2a1aeb05f1a170c33721
244 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=character+design+from+the+ground+up+pdf In PDF document text
    • http://begdas.space/biochemistry_viva_questionsen884.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/7PqxvVB/text_notification_sounds_samsung_galaxy_s5.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/i71jjdb/68797873214.pdfIn PDF document text
    • http://amst-watch-v1.club/22382606064yn6iw.pdfIn PDF document text
    • http://arnautmebel.ru/runescape_fletching_training_guideefibe.pdfIn PDF document text
    • http://lovemecompletely.com/78526765944xhjed.pdfIn PDF document text
    • http://magic-spring.com/filariasis_indonesiad3npl.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/NXgjhgo/facebook_lite_for_pc_uptodown.pdfIn PDF document text
    • https://denowulak.weebly.com/uploads/1/3/3/9/133997299/923739.pdfIn PDF document text
    • http://zopaxonurur.iblogger.org/right_side_navigation_drawer_in_android.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/U5CVgcT/zefojuxolowoja.pdfIn PDF document text
    • http://citimart.online/dwight_eisenhower_quotes_military_industrial_complexmqcc8.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hdhhyd2/horizon_t303_treadmill_australia.pdfIn PDF document text
    • http://daating19.site/vogisizexazozofomuj52p6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kamabutexukawiv.rf.gd/bushnell_velocity_speed_gun_user_manual.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_off0000c65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65D 5440 bytes
SHA-256: 40b2c04667cd66d50fcd914227a459d9243f6ecf270690202b54351a9e447e0e
font_01_sfnt_off0000d8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B4 12728 bytes
SHA-256: 0af50bcd96a3085458d2bc89acfcf3892a0f687d8f229d6caa4b410a14a81d4e