Malicious PDF — malware analysis report

Static analysis result for SHA-256 858932ed45f638ec…

MALICIOUS

PDF

82.5 KB Created: 2020-12-02 20:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 44a7baa085e5edc5e71c04d897731db3 SHA-1: da170199cd0b5a2e046008264847934457995bb6 SHA-256: 858932ed45f638ecdeea534b88513985555002d1490a491e922030df31b3c141
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a malicious URL, identified by the PDF_URI heuristic and confirmed by ClamAV detection. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'unequal fith', likely a phishing pretext. The embedded URL points to a suspicious domain, indicating an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=what+is+an+unequal+fith PDF link annotation
    • https://kutesavakelex.weebly.com/uploads/1/3/4/3/134336058/17f67dbfc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc28bf30a2757459bed6a63/t/5fc55e3bf3de5e49b5189aed/1606770235776/cps_security_employee_portal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3946e028-2880-4ad8-8ede-4bf43ee35684/bulujawebumizolaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf51d43f75b16643cbd9f4/1606373844630/36779743196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf260862-0be6-4604-a28e-6194239fea7d/27517023596.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/webcric.com_live_watch.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2df3570fb44d1c85d5a/1606283999458/21232939657.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/16096135540.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/fuvonibiwijazibojor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bc0541-b748-43d4-b04c-a55885542cf4/xilow.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/criminal_law_journal_india.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/velabowojisepulugalekelez.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc364a740f1034a5cb8cf86/t/5fc4248761e25426e1ba8982/1606689928512/wills_eye_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e0832e-9df4-4d4d-84ac-0530eac06098/womixugofudiwafasanubexi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5180827a199023ad07c53/t/5fc6a8226457125654271e03/1606854692172/ball_hero_adventure_red_bounce_ball_level_5.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3aed99955c744b54ce5b8/t/5fc67b7f9b1ed03538be1376/1606843264040/call_of_duty_mobile_download_apk_latest_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0055e5687f52b6b7c450a/t/5fc120bb9ee0f32b877b270f/1606492347701/deep_learning_algorithms_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 4900 bytes
SHA-256: 7b92c8b5f42ef94dedd1cf82ae337e2b01bde95db70f93cc1736cf9880eee129
font_01_sfnt_off000102f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 10564 bytes
SHA-256: a357ffc4e89aee9896bb9d81d6277a8e97946be2b79f4a6ec54e450ca3dae043
font_02_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 16200 bytes
SHA-256: b2f1af8d3c6c584ad6ab612038e42d95c20c66029f3ae806de29efdd7ffc45f6

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