Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc62084a87ef1a57…

MALICIOUS

PDF

77.3 KB Created: 2021-03-18 18:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3137f8794459291ca0d75d7afd3ef81d SHA-1: db0d247aeb3f13acb7c164a7bd9e619f94b080ce SHA-256: fc62084a87ef1a57250f8d9ac2cd2f86a035c06750c7efcaff23b3cd827a109d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to system design versus software engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=system+design+vs+software+engineering
    • https://cdn-cms.f-static.net/uploads/4403539/normal_600b622c036c4.pdf
    • https://static.s123-cdn-static.com/uploads/4450724/normal_5fecfd78d3d23.pdf
    • http://majelogajizivo.iblogger.org/51976474616.pdf
    • https://cdn-cms.f-static.net/uploads/4465941/normal_6034cdb8c0efd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/firigugixujotov/mamawamakefuremonun.pdf
    • https://s3.amazonaws.com/gagagakigibapo/fishbone_diagram_template_visio.pdf
    • https://s3.amazonaws.com/towakog/bullfrog_creek_fishing_report.pdf
    • https://s3.amazonaws.com/kelageketisefuv/pl_sql_developer_free_download_for_windows_7.pdf
    • https://s3.amazonaws.com/towutoginadivu/sujajawasuzin.pdf
    • https://s3.amazonaws.com/podawakumepewez/50541145990.pdf
    • https://uploads.strikinglycdn.com/files/59075e50-0569-46f2-9958-f23566dd7055/64575515251.pdf
    • https://uploads.strikinglycdn.com/files/83342fe5-c2f7-49ee-b0b4-eece5e43b6e7/59493287550.pdf
    • https://uploads.strikinglycdn.com/files/8eb16769-f9fa-4ac8-bee8-0952de7ba785/96644840412.pdf
    • https://uploads.strikinglycdn.com/files/61e4eaf4-64d2-4748-adde-bfed88893476/furofekad.pdf
    • https://uploads.strikinglycdn.com/files/6f4572e1-37eb-494d-95bd-80f5f409e805/does_fine_mean_ok.pdf
    • https://s3.amazonaws.com/zizene/prime_video_app_movies.pdf
    • https://uploads.strikinglycdn.com/files/9c482a54-4d05-4d20-856f-cdbe2b6e5f52/how_to_find_area_and_perimeter_of_irregular_figures.pdf
    • http://fonedasin.epizy.com/radupetalasesemarijope.pdf
    • https://s3.amazonaws.com/gurupixabogivaz/39330443054.pdf
    • https://s3.amazonaws.com/lusabifef/boosted_performance_farmingdale.pdf
    • https://uploads.strikinglycdn.com/files/79284f33-50a7-4b03-8fae-86f25d343da6/fukizuraditeragulibep.pdf
    • http://fasevofal.epizy.com/cash_flow_management_system.pdf
    • https://uploads.strikinglycdn.com/files/03ddd5d2-91d5-451a-ae6b-8f39a219648e/73543309650.pdf
    • https://uploads.strikinglycdn.com/files/1115b11b-b6f2-443c-98a3-d704f791138c/do_personal_narratives_have_a_thesis_statement.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_off0000efeb.bin
908d9b3d5cacc9cfc4483bdf6dd486926d177a58784d970df799d0c031b86e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 5552 bytes
font_01_sfnt_off000102d5.bin
d85a6eca11730574ad19176ca1d08e501a66d28153e11784c3aa6d9509239108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 10868 bytes

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