Malicious PDF — malware analysis report

Static analysis result for SHA-256 56eb93a1c02443a7…

MALICIOUS

PDF

66.0 KB Created: 2021-02-15 19:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6778d6fb82ebcdad8bd664101a60e120 SHA-1: c31544f2e9d12873c77e2195a4194036b88569a4 SHA-256: 56eb93a1c02443a7df09567e983b1a88f2a5412f3f65b3e8c9eddb5503287f3a
244 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
  • 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/wb?keyword=how%20to%20replace%20hose%20on%20bissell%20spotclean%20pro In PDF document text
    • http://uptodate.site/business_process_modellinguuq9w.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/3999332.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/bigeka.pdfIn PDF document text
    • http://onsideball.info/vekadopipeviwigogulr23w3.pdfIn PDF document text
    • https://cdn.sqhk.co/baradudapati/eCA8HCO/snes_roms_pack_para_android.pdfIn PDF document text
    • http://psychologyrelax.xyz/kodiak_truck_tent_for_saleuyqux.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/i4ujgie/anti_theft_security_system_for_shop.pdfIn PDF document text
    • http://podarokinsta24.online/common_nouns_worksheetldkas.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/4aac4522.pdfIn PDF document text
    • http://arbitestpark.xyz/carol_of_the_bells_sheet_music_guitaruatcs.pdfIn PDF document text
    • http://ecosbor.net/komo_4_traffic_reportadg6g.pdfIn PDF document text
    • https://latimemoniborij.weebly.com/uploads/1/3/1/4/131437487/wawidol_sijunasexak.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/26d745.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/mekonulegipero/analogy_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/73751857932.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_off0000c654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC654 5212 bytes
SHA-256: 278d5499d022fbcf6e4402802864b281a47552a7d02f6ec58a9c7f92218bd689
font_01_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 10200 bytes
SHA-256: f1d1b0955e876fea084f783a61a97dfe4b129218c776d4bf5d4e40e22608f0a5