Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f0fc6241bf15c5…

MALICIOUS

PDF

72.3 KB Created: 2021-03-02 12:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e2d2b2ef0c7673e0dbe83dd5db39d430 SHA-1: 5eae4560a6e520d84834e76681f8fefdb01e72bd SHA-256: a7f0fc6241bf15c59a0eaadcb3c2aa7e03cb4f6589fe077e4a9ff8f975efc01f
184 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
  • 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://yafferge.ru/wix?keyword=sonic+mania+achievement+guide In PDF document text
    • http://wowit.pro/bubble_champion_mod_apky84ol.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/jogafigazeromax.pdfIn PDF document text
    • http://faxadiweruxu.22web.org/todetopasinenawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475203/normal_5fcfa92cc550d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_5fd7dfbf3f793.pdfIn PDF document text
    • http://summ-green.fun/why_am_i_so_bad_at_statisticsx93y9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudopijafaj.epizy.com/lezidujarefetajokazise.pdfIn PDF document text
    • http://refowokewip.rf.gd/holika_holika_pure_essence_mask_sheet_cosdna.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/52248790555.pdfIn PDF document text
    • http://tonataf.epizy.com/vizio_32_inch_tv_no_remote.pdfIn PDF document text
    • http://tepobibofa.epizy.com/conspiracy_to_commit_burglary_sentencing_guidelines.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/mabawevufozipesoxafa.pdfIn PDF document text
    • http://vudazirukileri.epizy.com/37214366344.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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 5208 bytes
SHA-256: 39e0a27a19d5dfaf5e5e05b7f76af5f101ea546dd0af91efbb86fe4ebfe3f1ed
font_01_sfnt_off0000f06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06F 10664 bytes
SHA-256: 42c40deee63df96eb16a20b3eb6d3d26e9f4f33302bdd54d0e316c735794e99b