Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c0cfcf238ac6cb…

MALICIOUS

PDF

67.6 KB Created: 2021-02-21 23:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 553e0149d546c27ede6c5dd1f11dbc48 SHA-1: f0d5729415dd2d2ed577c48f7f965990a039d113 SHA-256: 88c0cfcf238ac6cba7e82834de74bd1d60a5c0e59724a103f1df3055249b01cd
186 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wix?keyword=davis+tree+farm+md PDF link annotation
    • https://cdn.sqhk.co/pefisemise/jcgeEOx/sustainable_development_goals_definition_ap_human_geography.pdfIn PDF document text
    • https://zimuvudiredefux.weebly.com/uploads/1/3/2/7/132710782/jupum.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/cDGnZyc/single_leg_ski_jump_exercise.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/9ijghhj/music_events_barcelona_september_2020.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/maxamanem.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/jghBl6V/didi_friends_selamat_hari_jadi.pdfIn PDF document text
    • https://sitavekoked.weebly.com/uploads/1/3/5/9/135974486/618376.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pedojup.rf.gd/3866188040.pdfIn PDF document text
    • http://bozisiruvaletun.rf.gd/vebujekivoxafuwanofu.pdfIn PDF document text
    • http://fusogusobu.epizy.com/70966100659.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/87095704324.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_off0000cbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB7 5080 bytes
SHA-256: c14df08600dc8d2aca5a93097c7c4ff54c8dcd57fbdde588feee77c22cf5c32f
font_01_sfnt_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 10900 bytes
SHA-256: efe097b11a322edc825f40b9b2f41a425347b09244658fa0c6434952709f87f1