Malicious PDF — malware analysis report

Static analysis result for SHA-256 914c3afe8da0a7a2…

MALICIOUS

PDF

81.8 KB Created: 2021-05-24 16:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2c707943c3214c226645e45c3b3f19a SHA-1: 99a26b838325ea6fc2394770d8b51e7fc5d1271a SHA-256: 914c3afe8da0a7a2a032fad497334a84dac6db2d0a7f96b24cb3bccae1ac2b1f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://kuzutuzo.ru/strik?utm_term=how+to+set+time+on+brookstone+bob+clock
    • https://static.s123-cdn-static.com/uploads/4411001/normal_5fd09590cbfb7.pdf
    • https://cdn-cms.f-static.net/uploads/4420468/normal_602c1097019e3.pdf
    • https://cdn-cms.f-static.net/uploads/4415518/normal_603ec7e7f15a6.pdf
    • https://cdn-cms.f-static.net/uploads/4374535/normal_601c674aa61dd.pdf
    • https://cdn-cms.f-static.net/uploads/4448347/normal_60254830d8e3a.pdf
    • https://cdn-cms.f-static.net/uploads/4382412/normal_6068c1eb65070.pdf
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6018529326ce5.pdf
    • https://cdn-cms.f-static.net/uploads/4419437/normal_6013b5be5fbd3.pdf
    • https://cdn-cms.f-static.net/uploads/4382966/normal_60171de8ab7bf.pdf
    • https://cdn-cms.f-static.net/uploads/4374203/normal_605abd25c65f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/36e494bf-6418-4235-a142-fa55ffbcb394/johnny_appleseed_story_in_spanish.pdf
    • https://s3.amazonaws.com/widiku/what_is_the_best_investments_for_2020.pdf
    • https://s3.amazonaws.com/sowirutelevolur/selupake.pdf
    • https://uploads.strikinglycdn.com/files/3bb12fd7-a179-4839-8db4-3fbab0f624eb/71985045366.pdf
    • https://uploads.strikinglycdn.com/files/c98c6476-65cf-4623-b812-044f30ad6611/lego_classic_ideas_book.pdf
    • https://s3.amazonaws.com/viregujipowuru/58445976805.pdf
    • https://uploads.strikinglycdn.com/files/9470bdad-a42b-48b2-87d1-de493986f8d9/pokavavajulus.pdf
    • https://s3.amazonaws.com/jewizopukuni/rupinder_gandhi_movie_hd_print.pdf
    • https://s3.amazonaws.com/bulikowexunepov/does_leo_die_in_the_blood_of_olympus.pdf
    • https://s3.amazonaws.com/daraniwekamidir/cheat_engine_6._6_free_pc.pdf
    • https://s3.amazonaws.com/nitirew/kumesozalu.pdf
    • https://s3.amazonaws.com/divikufifir/como_te_llamas_answer_in_spanish.pdf
    • https://s3.amazonaws.com/bepukuba/descargar_libros_de_derecho_romano_gratis.pdf.pdf
    • https://s3.amazonaws.com/tojazudibumogab/73599288551.pdf
    • https://s3.amazonaws.com/fexuror/salomakin.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_off000103bc.bin
90864d427cba0146a26184dc5ac0caf0a3c3d3344c1aa65a4c8ddc34c831ad10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BC 4992 bytes
font_01_sfnt_off000114b3.bin
78d637bcba4a719185653992626af4a5a2b325ed7a8a0896b9022c515ecc03cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 10628 bytes

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