Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a1f0499c9b9e46…

MALICIOUS

PDF

72.5 KB Created: 2021-02-11 05:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 52fe035b8b29bab98257ee25ed93bfe5 SHA-1: 306f0068721eabb69378debcdeee7024f013efcf SHA-256: 18a1f0499c9b9e46725c762bc78cbd6c42825e23ce9468f1e8e3a36196f9a015
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/aws?utm_term=conjunctions+in+english+exercises+pdf PDF link annotation
    • https://zelowomuguzak.weebly.com/uploads/1/3/1/3/131379017/f299455a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449768/normal_5fe448c2031b9.pdfIn PDF document text
    • https://farunekigevizaj.weebly.com/uploads/1/3/5/9/135976182/7a804108a0.pdfIn PDF document text
    • http://creamwalls.space/mewatamaleduwo2orwh.pdfIn PDF document text
    • https://kizerovum.weebly.com/uploads/1/3/4/7/134747257/cc6e9e071.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/fabexupumozas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418984/normal_5fe181ca4b3ba.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/cbse_10_marksheet_2019.pdfIn PDF document text
    • http://expressday.online/3974397821634vce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366029/normal_6000499a1d37d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://govogudumig.epizy.com/autopsy_2008_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/whatsapp_status_video_free_2019.pdfIn PDF document text
    • http://fosixijikalapi.epizy.com/16737266904.pdfIn PDF document text
    • http://sisuvoxodukon.epizy.com/57561675149.pdfIn PDF document text
    • http://fonobufusig.rf.gd/nodulib.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_off0000e010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE010 5256 bytes
SHA-256: db41db1f5a0aaa4852658394ae47483787813c57ced1d2a65456597493e29e72
font_01_sfnt_off0000f1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F5 10224 bytes
SHA-256: 68f3881be8ea602b795016f51d6a79e23b9278c0c30ad8c9ad8902497cd51d68