Malicious PDF — malware analysis report

Static analysis result for SHA-256 1581f9400ab52638…

MALICIOUS

PDF

80.0 KB Created: 2021-04-08 06:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2a0b90f93022afbd0ce8b467dc19925 SHA-1: d0f24ff70a8b0bd96bba7227c799a2a04fee7c4b SHA-256: 1581f9400ab52638bd7c008824c32b2dd2388d53bc886c3aa5fe2fd4c87fe3d3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to a search query, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=how+to+find+gram+molecular+weight+of+naoh
    • http://lnstagram-blue-ticks.com/46485452352m1kzd.pdf
    • http://mebelintera.ru/sql_server_queries_interview_questions_and_answers_for_3_years_experience7pofb.pdf
    • https://cdn-cms.f-static.net/uploads/4488315/normal_605f782334f9d.pdf
    • http://katipef.medianewsonline.com/50852728335.pdf
    • https://static.s123-cdn-static.com/uploads/4462708/normal_5fe37f4ff4016.pdf
    • http://ayazshabutdinov.club/66450893413koem0.pdf
    • http://lejifip.sportsontheweb.net/article_285_labor_code.pdf
    • http://wupunekum.getenjoyment.net/accounting_theory_7th_edition.pdf
    • http://letabumo.getenjoyment.net/cbse_biology_book_for_class_12_download.pdf
    • https://cdn-cms.f-static.net/uploads/4465687/normal_600cb9e0862f0.pdf
    • http://pofaduxiruk.getenjoyment.net/the_secret_doctrine_helena_petrovna_blavatsky.pdf
    • http://websporizle4.com/20190542867bntt3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ruzakema.onlinewebshop.net/modern_chemistry_textbook_answers_chapter_8.pdf
    • https://c827806f-f9bf-4fd3-a4ce-e487c020fa79.filesusr.com/ugd/6fd45c_7a67cd95d4b64df0ad4764649895c4cd.pdf?index=true
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdf
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_1cea7286cf684ad893eb674a94b3a4e9.pdf?index=true
    • https://4ec63ec4-77bf-4499-900e-7c522af20654.filesusr.com/ugd/35bdb9_52babd15b69c468797cb72b60b22e2b3.pdf?index=true
    • https://31e64076-56b3-4e53-9780-179364fbad2f.filesusr.com/ugd/d8d3cb_406b25c7343e4083812fdc95eaf050c9.pdf?index=true
    • https://adc67df4-9ac4-4169-8225-f8d60376216a.filesusr.com/ugd/a1c2c7_96ed55421b78462d9760c2c113c5d591.pdf?index=true
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_f6cae52ec2364b12a87ce712499ecb59.pdf?index=true
    • 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_off0000fa09.bin
75d593fde67978ea428451e67ef38152533e1fbbe1e2fbffe91043094c584ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 5312 bytes
font_01_sfnt_off00010bff.bin
c9942da124b7d90990196cc470591894d25afe760f52b0f00643931e8b14c7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 11436 bytes

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