Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf06b17708d74a8…

MALICIOUS

PDF

70.7 KB Created: 2021-04-06 14:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d0f96c7e333e548c642e26b5eac06470 SHA-1: ea0db80759ff78655736c4693141c34b05c1d2bc SHA-256: aaf06b17708d74a807e82f2f2d7cca69ff7ab0a80a77c3185ca30647e1f4a24e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Un curso de milagros facil pdf gratis', suggesting a lure for a free PDF download. The embedded URL 'https://gimoguvi.ru/strik?utm_term=un+curso+de+milagros+facil+pdf+gratis' likely serves as the destination for this lure, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=un+curso+de+milagros+facil+pdf+gratis PDF link annotation
    • http://sujabupinoda.scienceontheweb.net/73088019652.pdfIn PDF document text
    • http://kimujedat.mygamesonline.org/agave_tequilana_weber_variedad_azul.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/collage_photo_editor_for_androidk9pnt.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/2020_cadillac_srx_navigation_manual.pdfIn PDF document text
    • http://zosoxefu.22web.org/financial_reporting_manager_resume_objective_example.pdfIn PDF document text
    • http://zebrait.fun/how_to_change_time_on_accusplit_stopwatchrnlk1.pdfIn PDF document text
    • http://zafimapi.22web.org/relative_pronouns_worksheet_for_grade_8.pdfIn PDF document text
    • http://walapapu.iblogger.org/vocabulary_exercises_synonyms_and_antonyms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_cd7344898fd749ffa76f7c6f9edaff41.pdf?index=trueIn PDF document text
    • http://nejoluf.epizy.com/32561051316.pdfIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_845f79e9ebb647cbbaf10dbb33551f1f.pdf?index=trueIn PDF document text
    • https://ac911ccd-a574-46a9-bbb3-57bb927ff796.filesusr.com/ugd/2735c9_09188acdb98d4457b049c6bcdf82014e.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_5e14b78101e04b52b4873840f0941514.pdf?index=trueIn PDF document text
    • http://karababeso.rf.gd/8459901824.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_ea0559f604704a02a8de82e89db82c07.pdf?index=trueIn PDF document text
    • http://xinudigiwuwa.epizy.com/fixorowenamuvogidasakola.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_272c5d151c1f4c76bbfe9f617fa962b1.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_f5a1855fbbe64f45b9be7ded36a95435.pdf?index=trueIn PDF document text
    • http://witivovubujo.epizy.com/spring_framework_interview_questions_and_answers.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_off0000d0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B7 5468 bytes
SHA-256: 564d3b6a8d8c6570ecd7cd1490b67585ca63f9ccd40a0e678d983b45b4a7b363
font_01_sfnt_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 12720 bytes
SHA-256: 021d15bbfd7cd7aac5838b506340e98e2b787b4443252f7276fab0a1ec78c468

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