Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be5a2c7f8e787f6…

MALICIOUS

PDF

76.6 KB Created: 2021-03-29 00:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fed92c0a6e489059c25e88cb95770bb4 SHA-1: 2ac5a41f6c75a64f846003377bbeb41b5438ecd6 SHA-256: 0be5a2c7f8e787f65cc0e27bb2a9f4c6153fa30307508d3ffb8306093bd9864b
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The presence of an external URI pointing to 'leonvi.ru' suggests a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to trick users into downloading a payload, aligning with phishing and potential execution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=framaroot+apk+2020
    • http://biomaniks.website/53956894560mee2d.pdf
    • http://pubgmobiie.com/bcr_abl_gene_full_formeonvg.pdf
    • http://tevaruv.sportsontheweb.net/zulunufaxifijikodoj.pdf
    • https://cdn-cms.f-static.net/uploads/4378620/normal_602706ee8c087.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_603806645ab15.pdf
    • http://fisujerekuvij.getenjoyment.net/sewage_treatment_plant_download.pdf
    • http://deemonatrafik.xyz/11601459955dzu6g.pdf
    • http://detonic-italy.website/956087059576ci7i.pdf
    • http://mapenibo.scienceontheweb.net/7332370524.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_cb48d3f536224491b94d24b1eea93d6a.pdf?index=true
    • http://movasedumanepe.onlinewebshop.net/catalogue_automatisme_schneider.pdf
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_ecbfc59894a04b72ae633d119a88bcf9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7e87490-4bf4-462c-b447-f8b64101ac85/46706762540.pdf
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_f4668fae7d0b4b45aaeda68d64b60e5e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea61fc78-38cd-4b6f-a255-5b5b6d4122eb/interview_questions_to_ask_ceo_candidates.pdf
    • https://s3.amazonaws.com/fukezavazuj/zadigekez.pdf
    • https://uploads.strikinglycdn.com/files/3e65bf8c-25e4-4ebb-a41a-5d5c58e17e84/sigotetuwa.pdf
    • https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_42b5281d8f464bae8e58b00733812d57.pdf?index=true
    • https://s3.amazonaws.com/lekezaru/nec_phone_system_manual_dsx_22b.pdf
    • https://s3.amazonaws.com/vutame/fukirisepuratavatezevet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed69.bin
c8ab49360bb8a6c9954d582a1a16f749519060ad65267ede4af08c1883ab35f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 5048 bytes
font_01_sfnt_off0000fe80.bin
17d12c84f563823137c04090bf23a29739aa31aa7c8c71f689aa009fc8dba12a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE80 11040 bytes

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