Malicious PDF — malware analysis report

Static analysis result for SHA-256 09369aee6dd703d7…

MALICIOUS

PDF

85.0 KB Created: 2021-03-17 20:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2096b86e977aecc50c1d14d35a190c93 SHA-1: b027997b4a24b3a474fb778235cb7a09161622b5 SHA-256: 09369aee6dd703d71e5aab17f77544066d556c0715b08cac980da88fa32d55fb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains embedded URLs and a heuristic firing indicates a 'Clipboard command execution lure', suggesting the user is prompted to copy and paste content into a command-line interface. This points to an attempt to trick the user into executing malicious commands, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://pelibifir.ru/wix?keyword=luxpro+thermostat+manual+tx9100e
    • https://cdn-cms.f-static.net/uploads/4401973/normal_603cc9d068671.pdf
    • https://cdn-cms.f-static.net/uploads/4386335/normal_6024252e2fdfb.pdf
    • https://static.s123-cdn-static.com/uploads/4472479/normal_5ff158c09ba83.pdf
    • https://static.s123-cdn-static.com/uploads/4445128/normal_5fcccc5cf0572.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_d4b95e332852419d97a3110845b5fd38.pdf?index=true
    • https://s3.amazonaws.com/liluvad/listview_custom_arrayadapter_example_android.pdf
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_eeb95640291341bd88823b04bfeebdc2.pdf?index=true
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_5f53a17a36024a49b5a29b8a47ebc497.pdf?index=true
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_73fa6ce022364b1291c438996c268a19.pdf?index=true
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_e6d8772144d9400c81461e9ec23b710d.pdf?index=true
    • https://s3.amazonaws.com/tinezedu/tirapof.pdf
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_e59ee7d6a0c24cfaa162fea717663962.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43d77529-ace6-4534-a077-45177c5518c0/how_to_undo_a_page_break_in_word_2013.pdf
    • https://uploads.strikinglycdn.com/files/1f979b26-13b6-4575-b8fd-05abcc41f838/earth_unaware_orson_scott_card.pdf
    • https://s3.amazonaws.com/fedojigudaj/how_to_turn_on_dyson_v6_absolute.pdf
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_9d30378a681a4e7baa859ab7edf51b73.pdf?index=true
    • https://uploads.strikinglycdn.com/files/680a8edc-fedb-426b-ad27-de79e9f2659b/zukamizepoja.pdf
    • https://s3.amazonaws.com/jumedemimo/jedediwaver.pdf
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_ab16832d086c43f08b33d2436846f7db.pdf?index=true
    • 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_off00010c0f.bin
77df2786f6193515c49edb536c9e5a030150c0886792a336a8bcb5618260aa4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 5416 bytes
font_01_sfnt_off00011e57.bin
66149425e2c7ca8975311bc8c463c96dbf5f425ddfddaab7a7d971f8d987c47b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E57 11496 bytes

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