Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b95fc2464638d0b…

MALICIOUS

PDF

72.6 KB Created: 2021-02-27 21:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a0d83ede79b5b45e618deffbe100f3a5 SHA-1: dd77d0a81d5bd08f289a618544c77c8b792ce0ba SHA-256: 2b95fc2464638d0b1451505bbb1b03a4cd2716b28f29549dc05cdfec8cb8cdeb
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=roland+v-4ex+software In PDF document text
    • https://resodarapasak.weebly.com/uploads/1/3/4/6/134659305/3226917.pdfIn PDF document text
    • http://ligoturup.22web.org/69666554533.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/fiiEUG6/vikux.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/gejjvic/snake_game_unblocked_cool_math.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465688/normal_602fad434e929.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/4jmpGZC/national_motorcycle_racing_championship.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/YVggMeG/states_and_capitals_game_midwest_region.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/didjjNT/robot_shooting_war_games_robots_battle_simulator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391319/normal_5fc63e1e2cf77.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/percy_jackson_movie_3_in_hindi.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/1919884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_6027b1259e912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fc7a3a3eeed1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejotuwusa.rf.gd/wukuzilumuvumibojun.pdfIn PDF document text
    • http://wofelekupobepo.epizy.com/cotter_joint_design_sheet.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_off0000e032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE032 5248 bytes
SHA-256: 90c1517c11f3f78a32a3cbf5aaabe442b0782cb928675aeb821dfcfc2a99bcac
font_01_sfnt_off0000f246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF246 10412 bytes
SHA-256: 352801421594c12eb35f599dbf881c3b058cfb47327f7d4705e734a981714ddd