Malicious PDF — malware analysis report

Static analysis result for SHA-256 711183bcd05eb5d3…

MALICIOUS

PDF

87.7 KB Created: 2021-04-05 13:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 785beb0676e1c58a499586a9684470ff SHA-1: 06177b724a5d15e7f13cf9b7411f37ba3736bde0 SHA-256: 711183bcd05eb5d3c32f9c4c88cad71ea0ea5292e3299ff7fcc6957478b11ffd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate an attempt to redirect the user to a malicious site.

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://vilenefex.ru/strik?utm_term=how+to+study+for+step+3+ccs+reddit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5ffcc927dfeb1.pdfIn PDF document text
    • http://jugapus.sportsontheweb.net/winiwonujumivux.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/25338674846.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/las_brujas_no_se_quejan_gratis.pdfIn PDF document text
    • http://keluzizizeroki.getenjoyment.net/bocio_nodular_no_toxico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450641/normal_5fffa1246851e.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/99533147814.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/51418888629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fda47fa18f51.pdfIn PDF document text
    • http://mokaxizekebade.scienceontheweb.net/la_casa_delos_espiritus_movie.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/68779608249.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/bcps_calendar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5fe3aee4b57a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_5d1d585fe1a643f4b0c24003df513c0c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/264ab40f-825c-4e1f-a87d-9efe33e3ba21/xoxavitelixodulopapu.pdfIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_eecf460cc8c9491683111e092c3d5d48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jovekus/sportmediaset_calcio_probabili_formazioni.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/maxobufokojamizenigi.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/betting_raja_full_movie_hd_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77c2e073-e7a7-4ab2-9b4f-8e2a3900ff7d/saridakebonekugow.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/kokumixupebimu.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_ef6917e48099442991c20c1ea1510178.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/whatsapp_status_video_punjabi_new_2018.pdfIn PDF document text
    • https://196cdf53-7a38-4f80-8f5e-3ad65c24f50e.filesusr.com/ugd/e5a593_13c51448bf844d19b94d5526b158631a.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_52b255b064464db89c6b50fe0444045f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5000 bytes
SHA-256: 9a9db09e920d51a88b6eba2ad8dee46a4f22a3c1e5381937f1bca7f69a7aa594
font_01_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 10360 bytes
SHA-256: 87177bd79f4dce9377a2f4926e908d5499fe1e2ad59aaae99c8d6ad503519a69
font_02_sfnt_off00012889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12889 17528 bytes
SHA-256: 5deebe0477bae78221187bb082e0205812704328deedb5517af044620890c019
font_03_sfnt_off00014275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14275 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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