Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50a6e3486511c6d…

MALICIOUS

PDF

72.1 KB Created: 2021-02-19 21:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9136fd772191595c1a75fd5f8914ce18 SHA-1: 7cbfd30a6313f7cde1e8238167ff31a6e9a81689 SHA-256: f50a6e3486511c6d4dcf7e6c58f91e27eeb4efd9d8ba95565788a7a150adbac0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://seumenha.ru/wix?keyword=cell+analogies+worksheet+answer+key PDF link annotation
    • https://pijawofixogut.weebly.com/uploads/1/3/4/0/134017865/4213182.pdfIn PDF document text
    • https://wawizaliw.weebly.com/uploads/1/3/3/9/133986908/wefikenizugila-towasavibowoli-bevamona-zutojamuf.pdfIn PDF document text
    • http://govusosu.iblogger.org/gegat.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/40cc235b0.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/2fda5476b1c333d.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/pimune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495244/normal_602a88de82f44.pdfIn PDF document text
    • https://xibixijuli.weebly.com/uploads/1/3/5/3/135399677/618413.pdfIn PDF document text
    • http://wunedefewadonif.22web.org/xugetupebinekamosokojusow.pdfIn PDF document text
    • http://vipadobosu.iblogger.org/65406219831.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411498/normal_5fd87afb0f04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_600d5124a9302.pdfIn PDF document text
    • https://lojapajarete.weebly.com/uploads/1/3/4/5/134521209/5707665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_6022ae8412199.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poxarow.epizy.com/pipumogokazizuno.pdfIn PDF document text
    • http://jiboleramar.epizy.com/nuzoteximer.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_off0000d78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78C 5112 bytes
SHA-256: 9c5788fe034acfff01cf5c2b51de3275f8599fff9ef3789c577b2238e4f82dae
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 12772 bytes
SHA-256: 2719d95c72aa591371d779415d4300f3daedc009ec110d589344e0dd54d3b136