Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2863e30f9b2ba61…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 20:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a49cd6293d13b617189885705e1f236a SHA-1: d319458038eb10144aaa183614a0eacc364c7382 SHA-256: d2863e30f9b2ba61f3d3bb437dc2132add13e0708ccd9991804a216e5a000171
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=john+thompson+piano+grade+1 PDF link annotation
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/rarikexiladevij_xosada_fadil.pdfIn PDF document text
    • https://vugovarekuluf.weebly.com/uploads/1/3/1/6/131607096/warenifeda.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/gdslaxh/muzuzob.pdfIn PDF document text
    • https://nenafefetu.weebly.com/uploads/1/3/1/4/131406263/wufurarodox.pdfIn PDF document text
    • https://jazigibebegada.weebly.com/uploads/1/3/1/6/131606339/zufikiwosodegoniduxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481417/normal_6020ff3d1bc43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_5fd8be82304c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482190/normal_5fc7e54fd57df.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/hfzAzgg/lapboard_pocket_board_document_holder.pdfIn PDF document text
    • http://sesaxojatox.iblogger.org/33659299325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_6014e3c2bf0d9.pdfIn PDF document text
    • http://jumbochecker.com/consumer_reports_jobs_yonkers_ny1qork.pdfIn PDF document text
    • http://hot-money.fun/teginaxaxo1z9tr.pdfIn PDF document text
    • http://9gusevshop.space/soap_and_detergentwjjfx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470405/normal_5fc979f3199ac.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/c3gcpjb/ant_middleton_family_tree.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC017 8360 bytes
SHA-256: 559865a24f81b63f76c7c3d5113861d7755df4de7e6bb3bc7868e03bfc9a3098
font_01_sfnt_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 5380 bytes
SHA-256: a6da2a911fe3d171c91eccedfaba14b38912af5d0da972a5a2fa64f550c4e0a1
font_02_sfnt_off0000ee4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4E 10104 bytes
SHA-256: d29cdd7d7524bac0665ba966c5f12079c37e7eaaa4f6ab459fb27fb1a058ecac
font_03_sfnt_off000110be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BE 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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