Malicious PDF — malware analysis report

Static analysis result for SHA-256 272b39c8a8a6935c…

MALICIOUS

PDF

86.6 KB Created: 2021-03-18 14:19:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5db5830a7b1c76dd4794cc53ad53b1e SHA-1: 2a256ee25c5e6aef94b3845d89acc974d4fef5a2 SHA-256: 272b39c8a8a6935cf579e55f0c0779ea6ff845dce4ecf058ab89a69f43854341
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'gimoguvi.ru', which is likely a phishing site designed to trick users into downloading further malware or revealing sensitive information. The document body, though heavily obfuscated, appears to be related to search results, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=stewart+early+transcendentals+7th+edition+pdf
    • http://dalidokumum.22web.org/alter_ego_methode_de_francais_a1_download.pdf
    • https://cdn-cms.f-static.net/uploads/4502248/normal_601cc134b8ba2.pdf
    • https://static.s123-cdn-static.com/uploads/4374379/normal_6007c38d6e2a3.pdf
    • https://cdn-cms.f-static.net/uploads/4366401/normal_60125836cba19.pdf
    • https://cdn-cms.f-static.net/uploads/4480579/normal_604b3e903f5df.pdf
    • http://kuzikugipitimiz.iblogger.org/xedoxix.pdf
    • https://cdn-cms.f-static.net/uploads/4387031/normal_603cb08882d48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kataribijinezej.epizy.com/23128149074.pdf
    • https://uploads.strikinglycdn.com/files/90940015-bdd1-4c80-98e5-8c767dc012fe/8705651716.pdf
    • https://s3.amazonaws.com/fosalizuzu/lowrance_elite_5_hdi_setup.pdf
    • https://s3.amazonaws.com/dudurat/cuanto_es_un_metro_lineal_en_metro_cuadrado.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/chain_reaction_game.pdf
    • https://uploads.strikinglycdn.com/files/0ece3544-7155-405e-8927-a101d5002bb3/total_fitness_discount_code.pdf
    • https://uploads.strikinglycdn.com/files/400e6102-868b-439a-bb0c-ddadb6fafd97/dell_optiplex_9020_drivers_download.pdf
    • https://s3.amazonaws.com/mokixetat/android_google_source_samples.pdf
    • http://widuwuzal.rf.gd/88938485825.pdf
    • https://s3.amazonaws.com/zupenafud/free_anydesk_for_android.pdf
    • https://s3.amazonaws.com/gonafoziguwewe/colonialism_in_heart_of_darkness_slideshare.pdf
    • https://uploads.strikinglycdn.com/files/d424c661-90a0-482c-948c-efbc800bd1a5/the_veiled_virgin_statue_price.pdf
    • https://s3.amazonaws.com/zowejunef/magic_shandalar_windows_7.pdf
    • https://s3.amazonaws.com/zatasipezeg/2019_american_heart_association_cpr_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/64265359-5168-4f30-aee0-7baf869336d4/zatoxamifonisifum.pdf
    • https://s3.amazonaws.com/lupebesu/formato_para_presentar_un_informe_gerencial.pdf
    • https://uploads.strikinglycdn.com/files/0fa1afcb-6167-4110-87d5-6d53e8bf8133/noxagegix.pdf
    • https://uploads.strikinglycdn.com/files/67823e0c-76c2-43b8-81e2-b0e234e0c764/auto_repair_shop_near_me_open_now.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d7.bin
4c12dfc814594d9015ba5dd15d3bdc43c9adc96c797a4e275648cb47c5c9375a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 5408 bytes
font_01_sfnt_off00011448.bin
5000270216e74da2336c2d946e6d607e7154b9f9f8a9a3e5c28309059b3665fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11448 12984 bytes
font_02_sfnt_off00013e3f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3F 4324 bytes

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