Malicious PDF — malware analysis report

Static analysis result for SHA-256 d129e787a76abb3c…

MALICIOUS

PDF

82.9 KB Created: 2021-03-10 12:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3d81a5260e82772c0e13e50718f63896 SHA-1: 061520514756ec4640a47d2cbc0b0b4fca6f6cf9 SHA-256: d129e787a76abb3c74a4f61255d3880653fd10a798c3821a0bf96d81c45b98be
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to research themes, designed to entice users to click on the embedded URLs.

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
  • 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.
  • 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://jacksth.ru/wix?keyword=examples+of+themes+in+qualitative+research PDF link annotation
    • http://usejus.pro/99706319180k7et7.pdfIn PDF document text
    • http://omynutural.space/3062602829360igy.pdfIn PDF document text
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/viduwazuv_taduriw_zebenodetepaji_novadaf.pdfIn PDF document text
    • https://juxusuvib.weebly.com/uploads/1/3/0/7/130739690/dekilusa_lexenerexufibav_nozuvumanafop_guzenutamiw.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/75a1b.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/bhIbehd/porsche_driving_experience_atlanta_georgia.pdfIn PDF document text
    • https://pemogele.weebly.com/uploads/1/3/5/3/135324676/mitofanujama.pdfIn PDF document text
    • http://yewes.space/get_lucky_daft_punk_roblox_idwt7ep.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/pngiOCi/my_boy_gba_emulator_free_apk.pdfIn PDF document text
    • http://wegansit.space/zivogitolewubbuew.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/jcAcmRo/lujawelezazugozaber.pdfIn PDF document text
    • http://allfreebets.ru/volume_of_composite_figures_worksheet_with_answers9gkb5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_9f32a6b3cb9b469d9576f23b58f37ac6.pdf?index=trueIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_12f5744a4eb64806a48f68cb731bd672.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/terasaki_circuit_breaker_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/junolutakokalotudanozut.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/uc_browser_karna_hai.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_f452b8c63401466a8ee3176240ef20da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/satudifin/31879099593.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_8c039fdf949e4a698e0149d7d1548cc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/musescore_sheet_music_at_your_fingertips.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_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 5468 bytes
SHA-256: 16d9deadbe83c5bf8b4c0468cce7151a305dbba83056cf56401c8cc7bff6de14
font_01_sfnt_off00011ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 10092 bytes
SHA-256: 2f9ea29c8f744bf88ed171cc7471eef29902567d6fe0e885948a4b017b881c16

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