Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c1a4b09812e28f…

MALICIOUS

PDF

62.8 KB Created: 2021-01-31 10:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: aedcf2cfaf6982303ccec8f2c79c539e SHA-1: 8b94b18384370a676550b754faa93b1a29ce7e9f SHA-256: d4c1a4b09812e28f3c1677f6487a3cca81bd219057d2fdf99b85656540fa5d3d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/aws?utm_term=non+chronological+report+examples+ks2+tes In PDF document text
    • http://callipakk2.site/24399669063dw3hc.pdfIn PDF document text
    • http://neyroskakalka.site/gumball_games_darwin_s_yearbookiqngx.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/jahi8hh/retabarav.pdfIn PDF document text
    • http://skidki-day.site/panodolewesapb8o1q.pdfIn PDF document text
    • http://pubggaming.online/multiplayer_in_city_racing_3dbymhl.pdfIn PDF document text
    • http://santaparker.store/lojoseruxepobufasolowivizsbwi4.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/jbigzvh/94406928644.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/1haPibU/blues_players_2020_football.pdfIn PDF document text
    • http://youtube-subscribes.com/urdu_words_used_by_police3ck41.pdfIn PDF document text
    • http://domastmsk.space/doninawumokekbjhur.pdfIn PDF document text
    • http://gbo.guru/44610216804zp7ic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwuzij.rf.gd/titurunez.pdfIn PDF document text
    • http://boraxijud.epizy.com/vakowokemolamokovekufo.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/aggiornamento_windows_7_sp1.pdfIn PDF document text
    • http://govatojajij.epizy.com/bootstrap_3_login_form_w3schools.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_off0000b9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E6 5580 bytes
SHA-256: 9e2da92fa99868a382124d4a1450991b5eb7f880390c9e849b0567d36a0c7325
font_01_sfnt_off0000ccc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC4 9732 bytes
SHA-256: e08fe11c077888f38fa7d3324af94f3cef6bf52e744649230ad63329cc2e23af