Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d19f7abffe453d…

MALICIOUS

PDF

79.2 KB Created: 2021-03-31 22:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c76869ffaaea5e184da39cfc6a83c9e SHA-1: e8ba5a1e2361e8aa67e328aff8598e281fccc36a SHA-256: a7d19f7abffe453db4f21d8058de97882b543f1f8050e42573262cf30f2bb339
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, which is likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://resalured.ru/award?keyword=all+cars+logo+with+name+in+the+world+pdf
    • http://vemelaribox.getenjoyment.net/dojerofakek.pdf
    • http://boribonabone.mypressonline.com/nutricion_alimentacion_saludable.pdf
    • http://fonexewof.mygamesonline.org/77307172715.pdf
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fc66b914303d.pdf
    • http://myluckywin.site/at_the_cadian_ball_feminismy52rp.pdf
    • http://repochka.site/jugufonuluruavwv.pdf
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/720675.pdf
    • https://cdn-cms.f-static.net/uploads/4465003/normal_6047555e600e4.pdf
    • http://gufutaca3.xyz/85722600004ygm4b.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/53c8aa524d.pdf
    • https://cdn-cms.f-static.net/uploads/4419235/normal_604976c2228d0.pdf
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/fazupedagojof_kagorido.pdf
    • https://cdn-cms.f-static.net/uploads/4372972/normal_601765a04ebdf.pdf
    • http://thechambre.xyz/how_to_learn_basic_ethical_hackingaqz04.pdf
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5fd7de0973487.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a1ceb106-a381-4527-83db-9c74e5766bc4/27841555989.pdf
    • https://uploads.strikinglycdn.com/files/8009e902-45eb-4d8f-8869-7be5ed8f6e6f/oracle_software_development_manager_interview_questions.pdf
    • https://s3.amazonaws.com/kigavanus/petinuwano.pdf
    • https://uploads.strikinglycdn.com/files/0b041980-3a32-41c5-87b0-a8707fb02bc8/best_hidden_picture_game_app.pdf
    • https://uploads.strikinglycdn.com/files/bcc50929-5660-437e-8c26-2cbbfad1b882/air_oxygen_ratio.pdf
    • https://s3.amazonaws.com/tabobujimo/41781027617.pdf
    • https://s3.amazonaws.com/firigugixujotov/23088200480.pdf
    • https://s3.amazonaws.com/tapexiw/56016191553.pdf
    • https://s3.amazonaws.com/lebejos/luwufowebe.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_off0000f6a5.bin
b751d32ea3a5ab6be4ad0bf789629c82d19aa55eff281fe2f6886e73bd0c4ede		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 5652 bytes
font_01_sfnt_off000109c2.bin
245d111743704c8efffcd0ca490389c3ba730fa1e90712afdd339f0c33ea705f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 10892 bytes

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