Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce973197df4e5ea…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 20:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fbd30d2127ee86d7c365ffc3c4aff59 SHA-1: ec43c1819cd645be747654d14134d3901abee19b SHA-256: fce973197df4e5eafa2bcf2c67b6948191222c62b7b85b23eca4a69a73c495e2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely used to host malicious content or facilitate phishing. The document body, though heavily obfuscated, appears to contain text related to an essay title, suggesting a lure.

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://resalured.ru/strik?utm_term=power+of+media+and+information+essay
    • https://cdn.sqhk.co/nalujujoso/dIgejha/surface_project_dawn_hidden_objects_games.pdf
    • http://tumbochka.space/mifinanulanasasiz7g2x.pdf
    • https://cdn.sqhk.co/gipagigo/g7faif8/36817285946.pdf
    • https://cdn.sqhk.co/ribegibonot/eTjbjaX/sixanovibize.pdf
    • https://cdn.sqhk.co/goduwonon/jhcgia4/54561782763.pdf
    • https://cdn.sqhk.co/wujugojuse/epliiAU/vector_addition_and_subtraction_worksheet.pdf
    • http://fastnoutservice.ru/basic_machine_learning_program_in_pythony54i4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/be5d6efc-2723-40dd-9f0b-2e3139db0758/air-o-swiss_7133_humidifier_manual.pdf
    • https://uploads.strikinglycdn.com/files/7b2fde59-efcd-4a03-8743-294295ff621f/58651693787.pdf
    • https://uploads.strikinglycdn.com/files/e9038e42-d71e-41d4-8d4c-14e798342cb1/how_to_become_a_medical_lab_technologist_in_ontario.pdf
    • https://uploads.strikinglycdn.com/files/81a0fa2f-cdc4-462c-b722-9b87275663b0/books_like_the_captive_prince_series.pdf
    • https://uploads.strikinglycdn.com/files/41281682-701d-40d3-a412-e7d7c27f49e1/64985338307.pdf
    • https://uploads.strikinglycdn.com/files/b748afe2-ad79-4b5a-823e-4a9afcbb28cd/wusidivo.pdf
    • https://uploads.strikinglycdn.com/files/4a94915e-806e-4dcc-8fc0-b3d2a5cbcc13/79142028884.pdf
    • https://uploads.strikinglycdn.com/files/5662a182-f20d-43fa-b5f8-4f02512590b3/gukadogajobalavorofug.pdf
    • https://uploads.strikinglycdn.com/files/4c3bbb74-84f2-4e78-a705-a114dcfda4c2/mukilevugenexata.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_off0000edd7.bin
59a917cf0f18f297867defd90839f75914968b711ae0e8767c93c6728d4a10de
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 5216 bytes
font_01_sfnt_off0000ff93.bin
f386ecc68ad7031142601ba0a56586dccb6b812f814312ad19c5aee135f8c226
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 11044 bytes