Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b22ba6b50890ffb…

MALICIOUS

PDF

78.2 KB Created: 2021-03-21 06:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f8c6f081b19ae9eda4742dcd929f3343 SHA-1: 6767e02e0347d05c613b8def2025534898f0326e SHA-256: 0b22ba6b50890ffb888720573ed6a83972c3269294682dc3059b6e8ab64362b4
126 Risk Score

Malware Insights

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

The file is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of external URIs and the 'link farm' heuristic suggest the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=automobile+technology+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5ff0a70db1a65.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/xokaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_5fe2438c5a1f5.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/el_diario_de_greg_2_pelicula_completa_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468814/normal_604a5b38adaf4.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/platinum_physical_science_grade_12.pdfIn PDF document text
    • http://tafuvomilo.22web.org/44996059291.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/64383991587.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/alinea_cookbook_download.pdfIn PDF document text
    • http://nijovilof.iblogger.org/android_17_tournament_of_power_dokkan.pdfIn PDF document text
    • http://zuxemesemubozo.mywebcommunity.org/sukapadufagilekorufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_ec74d4583b214af6822e93aa6673d9a2.pdf?index=trueIn PDF document text
    • http://solukirakologi.epizy.com/dining_chair_cad_blocks_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86c75c5-77f7-48cf-9c96-a4740045297a/78096177991.pdfIn PDF document text
    • http://mixezized.myartsonline.com/lefujujilonekutilo.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_2c73ddab38424f578ba2a62d5c048864.pdf?index=trueIn PDF document text
    • http://vexabimumemig.atwebpages.com/51987573744.pdfIn PDF document text
    • http://tikeresepujel.onlinewebshop.net/rujelepaninafale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc3e987-f9e8-4d81-9981-4dd63c43fa5e/nazm_hikmet_hayat_ksa_iiri.pdfIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_0bc0b5076f4a4e14a497dca6c1ae3aa5.pdf?index=trueIn 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_off0000f22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22A 5316 bytes
SHA-256: b7085e86b70f80b1f1a7461e8c04a1285c21ca160b234e9b9a7aa01f759cc43a
font_01_sfnt_off00010425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10425 11800 bytes
SHA-256: 35ccaf806b780915730d731426e7fe5c1edacb858eea157d510ad615510369c8

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