Malicious PDF — malware analysis report

Static analysis result for SHA-256 27bf739ff375d3d2…

MALICIOUS

PDF

205.3 KB Created: 2021-04-17 16:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 47f2cbf46a1053caef339c0310913eec SHA-1: ca94b959b9f58a423986b517148e8305b1cb579d SHA-256: 27bf739ff375d3d2de7ef5275a03a7054eb4916740183dbae351ca03e6005220
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Ley de propiedad en condominio 2020', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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://nipisod.ru/strik?utm_term=ley+de+propiedad+en+condominio+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379240/normal_60001229eb625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416149/normal_60071334b0a3a.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/nimaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_604b928b0b2df.pdfIn PDF document text
    • https://zegotasubevit.weebly.com/uploads/1/3/6/0/136097081/fejagenewigonofagom.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/xepodurero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_60197559441aa.pdfIn PDF document text
    • http://leafester.online/when_can_you_plant_tomatoes_in_south_floridajrr1g.pdfIn PDF document text
    • http://revershjtb.site/acca_f5_lecture_notesrz94l.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/is0jdjg/human_thorax_organs.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/jje6iid/building_service_management_software.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/nufosupisuwulo_tikosed.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/TlGfjcR/down4sound_subwoofer_bass_knob.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/historia_del_estado_de_mexico_desde_la_epoca_prehispanica.pdfIn PDF document text
    • http://sexesex.site/rc_gyrocopter_kit2eq4p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_6026b23961502.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/vqjhphe/1436744050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e560ac7c-6419-477d-8a93-9242e5b394a3/38177475460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea3c499-e2e8-4028-bcd5-9ff824ee3569/74167878144.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/hypertension_drugs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff492f1-2fd0-4354-aa5c-89ea64b39d93/new_look_off_white_denim_jacket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a52e0db6-2bd1-4e34-8cfa-22fbb736dd6e/80565594349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0399eac-31d0-484d-ab69-705efe2ac085/gofukuxuzilonisu.pdfIn PDF document text
    • http://vameberimonon.onlinewebshop.net/hindu_baby_boy_names_starting_with_ni.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB6C 5324 bytes
SHA-256: f341831ec1bc4dbf5d7a0c5abecc1db0914e68dd08958519cb427a9a3c753bbc
font_01_sfnt_off0002fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD7F 12180 bytes
SHA-256: 281061774e4a4b4eda6c9a8bdd7b6daaf1487ddd040c8fd111bdff464181bc63

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