Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbe3a5c6f365ca5…

MALICIOUS

PDF

66.7 KB Created: 2021-02-25 04:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c23d5ba85540ebc0386fb4fced0e251f SHA-1: 1da165f0386ab9d4565d72c03f2ded23218233d4 SHA-256: 1cbe3a5c6f365ca5a8a3e1897664c925a15a228583674f2d5ea6e32cc8338cf3
184 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.
  • 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/123?utm_term=wahl+clippers+professional+uk In PDF document text
    • https://cdn.sqhk.co/sabumijobude/ighejc4/chicken_crossing_the_road_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/evgizHR/gudos.pdfIn PDF document text
    • http://kernig.pro/planes_controlados_telceljc492.pdfIn PDF document text
    • https://cdn.sqhk.co/ruretibot/HwSPWjc/dragon_ball_craft_games_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443814/normal_5fd79ae90cba1.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/q0kmhds/4207744943.pdfIn PDF document text
    • http://argo-tourism.com/rumodusexumudorik55q8j.pdfIn PDF document text
    • https://cdn.sqhk.co/gizafimode/gejbejc/rounded_sheetrock_corners_or_square.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/jjpibIm/47587872051.pdfIn PDF document text
    • http://sollabs.xyz/android_smartphone_comparison_20182stlg.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/chigcy4/gugemevisoxevifuxonu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_5fe34a4c6adb8.pdfIn PDF document text
    • http://manybigs.space/mebidigimurxtoad.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/jijumupade/16959175990.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/61720783948.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_off0000c860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 5180 bytes
SHA-256: a635f26c838c3b2412631bdb6fcf88f80c6a77effad162208c23ac81cf58c455
font_01_sfnt_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 10488 bytes
SHA-256: 137c2140d2b17f0934f9b863be7dde9ec57005e8b48af48db2a374fcb564e39f