Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ceea1cfb1f359bf…

MALICIOUS

PDF

71.9 KB Created: 2021-02-26 07:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 60f24966a754513c276c89896dbd5f2a SHA-1: f4a99fce692fa6e6fe544d13f736b387761bb9fa SHA-256: 3ceea1cfb1f359bfe18803ee0d19ff81a70fc99ef4bd84efbe27966178632c8a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=one+minute+manager+book+review In PDF document text
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/2363013.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/21307073493.pdfIn PDF document text
    • https://batapasupo.weebly.com/uploads/1/3/1/4/131482803/zigaligojigote.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/kolimoripusapoxer.pdfIn PDF document text
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/8355737.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/kijivaref.pdfIn PDF document text
    • https://fusonunobowur.weebly.com/uploads/1/3/0/8/130813531/4108546.pdfIn PDF document text
    • https://zabugejagovim.weebly.com/uploads/1/3/1/6/131637755/7c8e321469.pdfIn PDF document text
    • https://guvatezip.weebly.com/uploads/1/3/0/7/130776756/gulixegosi.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/97556714514.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/xofir_wadig.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/5b45c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/befomosijenip.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/how_do_i_use_ecg_on_apple_watch_3.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/94606459754.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_off0000de21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE21 5180 bytes
SHA-256: c1c194ed255b9e020d3138b6dec8b84be6ff3a4c13a379366341e86f61c40369
font_01_sfnt_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10248 bytes
SHA-256: 267ee7e86b3722bdae139e55f6a7e9b24f2a68b34c76a2bb19953f0d96fe14a1