Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a3d78a12a09f96…

MALICIOUS

PDF

75.6 KB Created: 2021-03-21 07:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14b6821badb813c5eeef045e723d6cc5 SHA-1: 74789ae11cb74e31826ad14dc67be075163d95f0 SHA-256: 50a3d78a12a09f96b43123b0c067f32fe6421e49ad2122982f150a0e97d00f68
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://xezojetit.ru/wix?keyword=spinal+nerves+exit+the+vertebral+through', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains text fragments that may have been intended to disguise the malicious intent. No scripts were extracted, but the presence of external URLs and the high ML score suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=spinal+nerves+exit+the+vertebral+through
    • http://devgm.design/dibujos_de_frozen_para_colorear_para_niosibhxw.pdf
    • http://domainlimax.xyz/migofawumuferidnowq.pdf
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/kurosazegoxoza.pdf
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5ff2f04b2630e.pdf
    • http://vuvajujuli.mygamesonline.org/peg_perego_primo_viaggio_4-35_infant_car_seat.pdf
    • http://desajegurake.scienceontheweb.net/physical_science_grade_12_book.pdf
    • https://gejomomik.weebly.com/uploads/1/3/4/7/134719116/dowuderuvegixogozi.pdf
    • https://cdn-cms.f-static.net/uploads/4402737/normal_601c67ff4b856.pdf
    • http://fukazab.mywebcommunity.org/felukawudunumavowibevijo.pdf
    • http://options.expert/perubawugofanikawowuti7v845.pdf
    • http://giwapozolaleg.mypressonline.com/argumentative_essay_conclusion_paragraph.pdf
    • http://stnold.com/84255638279uvda0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pojikovewijeja/watch_time_travelers_wife_free.pdf
    • https://s3.amazonaws.com/gezetega/28959017090.pdf
    • https://s3.amazonaws.com/lumixi/vampire_the_masquerade_camarilla_5th_edition.pdf
    • https://uploads.strikinglycdn.com/files/ab641e68-376b-4c0e-88fd-5be3ae635651/58678528400.pdf
    • https://uploads.strikinglycdn.com/files/a5942e5a-31c6-461d-97d4-d482d9e2c241/59832312449.pdf
    • https://uploads.strikinglycdn.com/files/a09d0a92-1ec8-4605-8f07-6bdc1d432efe/glencoe_algebra_1_textbook_2018.pdf
    • https://s3.amazonaws.com/fisulefajow/adobe_animate_cc_2015_portable_free.pdf
    • https://uploads.strikinglycdn.com/files/e345af09-eb17-4d32-8c74-7204551e38a2/50976368352.pdf
    • https://uploads.strikinglycdn.com/files/2a2976a6-c15a-442f-95ea-b8c756fb58cf/hoover_elite_rewind_plus_wont_turn_on.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_off0000e86b.bin
e904f3b21c70ea4034c48ee9dd04151f18b002af62996a9f5d19b7801efbbf78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE86B 5452 bytes
font_01_sfnt_off0000faf1.bin
8e52a4f93fa230f8ede815b65d3cc20cde6225ac8ee0ab936fbbe13221b177b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF1 11184 bytes

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