Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47fa265183ae489…

MALICIOUS

PDF

72.9 KB Created: 2021-03-23 10:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 518f6af4929fcab60d6abcd842c3589d SHA-1: b5ac4e909b0058362ca3833b42389a05f4fddad8 SHA-256: e47fa265183ae489d3d2c81f9650b06db253f8906a4a2841074a93300f0e89aa
196 Risk Score

Malware Insights

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

The PDF document employs a social engineering lure, presenting itself as 'Lego warhammer 40k dreadnought instructions' to trick users into installing a browser extension or update. This tactic is commonly used to facilitate credential theft or download further malicious payloads. The presence of numerous external links, including one to 'jumiwimov.ru', suggests a link farm or distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jumiwimov.ru/strik?utm_term=lego+warhammer+40k+dreadnought+instructions
    • http://natnat.fun/55816380586fdfka.pdf
    • https://togawakavepanef.weebly.com/uploads/1/3/1/1/131163752/aba5a.pdf
    • http://phillipen.online/jerazatwihi9.pdf
    • http://bossyonlinex.com/catalyst_life_science_book_downloadlwc3m.pdf
    • https://cdn.sqhk.co/girewobo/fDPhaib/78091881449.pdf
    • https://zepukuliro.weebly.com/uploads/1/3/5/9/135964459/38f4ec7a42083.pdf
    • https://pikisavejalanab.weebly.com/uploads/1/3/3/9/133986241/wafikugosur_fonudusono_bazepe.pdf
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/cc535.pdf
    • http://majidadap.22web.org/4771827910.pdf
    • https://vapotilixivurok.weebly.com/uploads/1/3/0/8/130814345/zamabusima.pdf
    • https://cdn.sqhk.co/jawubibegeba/jeCibgd/algebraic_expression_worksheets_for_6th_grade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dobevux.epizy.com/dna_structure_and_replication_worksheet_answers.pdf
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_7287df1ec2d4497dbf23c9b4609a5637.pdf?index=true
    • https://s3.amazonaws.com/jofunozuzof/fagewazipaselofalowegij.pdf
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_0891aed0176a4088b32d40df31493ae2.pdf?index=true
    • http://sapokumafunu.epizy.com/algebraic_expressions_worksheets_with_answers.pdf
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_30120dc146d744049198a238bf3049ff.pdf?index=true
    • http://vipovanur.epizy.com/peparinisosupi.pdf
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_bb1125c541a346c8a57797aad0dd10fc.pdf?index=true
    • https://s3.amazonaws.com/mejados/free_online_resignation_letter_template.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_off0000dc57.bin
b97f8d474a9cb7a17893a3cf70ac72335771b9ce6c2fa44d105bcb7ebd890869		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC57 5648 bytes
font_01_sfnt_off0000ef80.bin
0761bb52dd4ccae58bb666fd8f5def68a6efe364c4b77a7f4096faa6e580d81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 11292 bytes

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