Malicious PDF — malware analysis report

Static analysis result for SHA-256 331af021e429c7b5…

MALICIOUS

PDF

172.5 KB Created: 2021-03-24 11:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a9fd4738eda93cc5046aeb97bf8c3c6 SHA-1: 5127ffa5fe68c5a5f7a054eae3a719453c3dc67f SHA-256: 331af021e429c7b5f8cc299fa1b3d01742f84bd4af718aae1f11076fc884e5c3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a lure related to 'Canterbury tales test answer key'. It embeds a URL pointing to 'lozipotod.ru', which is flagged as malicious by ClamAV. The ML classifier also strongly indicates maliciousness, and the PDF structure contains external URI references, suggesting it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://lozipotod.ru/wix?keyword=canterbury+tales+test+answer+key
    • https://static.s123-cdn-static.com/uploads/4418180/normal_60074e8055213.pdf
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/a67753b.pdf
    • https://cdn-cms.f-static.net/uploads/4419626/normal_603136012e2ad.pdf
    • https://static.s123-cdn-static.com/uploads/4367959/normal_5ff1bf541f8a2.pdf
    • https://jojapewabivato.weebly.com/uploads/1/3/1/3/131379205/8948978.pdf
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/23cbcd.pdf
    • https://cdn-cms.f-static.net/uploads/4387233/normal_603295980ac31.pdf
    • https://kojovade.weebly.com/uploads/1/3/4/6/134681743/bemutes-medutex-bonavepimejaj.pdf
    • https://static.s123-cdn-static.com/uploads/4482399/normal_6002f0a34d21a.pdf
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/kezilit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_82bc2e7cd34445558c7202cb668c6d40.pdf?index=true
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_ad1e7af8be1142d2a805b15556887c42.pdf?index=true
    • https://s3.amazonaws.com/jevedijadiki/g_star_cad_2018_free.pdf
    • https://s3.amazonaws.com/pisedij/wise_and_foolish_man_worksheet.pdf
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_a0795506050e4f45af126a98c9038b99.pdf?index=true
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_4b20ed781bd643d7a22090053c9fb296.pdf?index=true
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_e40fb928be1d42ecb1ae564f36221ef7.pdf?index=true
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_bf30b8d51a0c48419efa32f1b5ba5c36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/42b61240-c592-4f42-b493-76ef65e0233b/cuantos_tipos_de_bombas_nucleares_existen.pdf
    • https://s3.amazonaws.com/vutame/how_to_find_disney_plus_app_on_lg_smart_tv.pdf
    • https://uploads.strikinglycdn.com/files/e010386f-3a09-4736-b19a-30e574cb9a80/what_is_the_theme_of_diary_of_a_wimpy_kid.pdf
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_de5ad8c2d3cf4e4db70ff77a493cdb34.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ed223a2c-6bfa-45f2-8a96-6e42cb57b61e/67762181688.pdf
    • https://uploads.strikinglycdn.com/files/b14a8de4-b972-45e6-af9b-01a4b23175b9/what_is_the_best_way_to_learn_dutch.pdf
    • https://uploads.strikinglycdn.com/files/1c3271b0-2fb3-4fe3-a581-12d549ee9c42/lugopo.pdf
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_86466dc0123448718ad49c9e608bd363.pdf?index=true
    • https://s3.amazonaws.com/tazibabebamep/notice_to_quit_assured_shorthold_tenancy_template.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_off00026c7a.bin
bff439a26bf2047b88f551ab4a89c4d3a6d69a0ee2bbad1e2d11dc575918e6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26C7A 4980 bytes
font_01_sfnt_off00027d8e.bin
7206100d35033dd6be796e7b1744fd86bac225c61840408e8bf2ea6b146060c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D8E 11196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.