Malicious PDF — malware analysis report

Static analysis result for SHA-256 6deca2c77b2a9c54…

MALICIOUS

PDF

80.5 KB Created: 2021-04-01 01:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2cbf0e9d502ed6e36dee81386e437673 SHA-1: 9d22c461f50ab97c9d79411640cd9019dfe34548 SHA-256: 6deca2c77b2a9c541bada88c232d6c4f96faa99c95cc370dd8fbf4c3151fc211
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external sites, with one specific URL identified as malicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards an attempt to redirect the user to a malicious domain for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/strik?utm_term=pioneer+vsx+820+setup PDF link annotation
    • http://saxefitipar.iblogger.org/kuta_software_congruence_postulates_answers.pdfIn PDF document text
    • http://maporirunigis.22web.org/cooling_tower_diagram.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/ejemplos_de_molalidad_ejercicios_resueltos.pdfIn PDF document text
    • http://wapiwikitob.iblogger.org/77501555160.pdfIn PDF document text
    • http://pusudekevuwew.22web.org/autoestima_definicion_psicologia.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/aa20f8aa-f133-43cf-b87b-5f883b404db7/maytag_bravos_xl_washer_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/guzanabaganepik.pdfIn PDF document text
    • http://lidixikeb.epizy.com/33142878968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17df5801-d9b3-47ca-8aec-57889873de7f/tawuvazepatezowunekib.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/voxuxojiwogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf501b6-4e76-4cdd-b543-9771dcbec3bd/mixing_red_and_yellow_makes_what_color.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e083394-b02d-4a5f-9ae7-558aa32f47bc/chomsky_language_acquisition_device_theory.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_1b5cdee732464331a58f814f7735ce11.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/35328160894.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/bolulunilujetinebu.pdfIn PDF document text
    • https://7d33af4c-acfd-4996-9436-348e89828b5b.filesusr.com/ugd/289672_162e916d0fd64d9b87b116f65c293d73.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/apprendre_le_franais_oral.pdfIn PDF document text
    • http://pavafisufopu.myartsonline.com/vepirisodudoxawitibosa.pdfIn PDF document text
    • http://taberadajip.atwebpages.com/nj_transit_bus_schedule_197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5248adc-1761-4d9b-a189-df7e85a8677f/sonidanebeluv.pdfIn PDF document text
    • http://womidelere.myartsonline.com/breeding_and_seed_production_of_flower_and_ornamental_crops.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/how_to_recover_dahua_dvr_password.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/zulitijefijajifedulotuze.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/easy_way_to_stop_smoking_epub_free.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/57004844460.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC27 2056 bytes
SHA-256: 63f03049ff57b2aa6574216c209eb7ea9b58950014fd448b2a51c3d03c883fab
font_01_sfnt_off0000e58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58D 5916 bytes
SHA-256: 8d02da5438dfdae127910baeef18e3eba55e3289aafdfec894c53a7b843196ab
font_02_sfnt_off0000fa0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 5168 bytes
SHA-256: 823be5f95e876dd72a12f21cbd8a28b64bfff0f586a3da058db9a2485d85aad5
font_03_sfnt_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 11316 bytes
SHA-256: 85a45bcf17323cb81317f679d6b3f39fe9ec7a648e8628ae324571e40dc566b9

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