Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17ef33e4cb3186b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 09:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 21a5efeb72cddeba962f579eafe1bd99 SHA-1: 1b1524cb8f0037de76ae46c00d38e344c66cc52f SHA-256: d17ef33e4cb3186b0b506135187ba13534115d99e2dfbb68a919c37a8cbaa010
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by ClamAV as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, appears to contain keywords related to phone resets, suggesting a lure. The presence of multiple external URIs and a high ML classifier score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=samsung+grand+prime+plus+hard+reset+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450634/normal_5fd170c1303ec.pdfIn PDF document text
    • http://bijepitujutix.sportsontheweb.net/4510332110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_601a7419eea3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_6044f7b2951c6.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/37731766837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6015ab5d47bd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_601c6126ac016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb0508fd-2a1f-4901-a161-a76823ee8e4f.filesusr.com/ugd/52013e_6c92cb5c86fe485a8ae6718596cd7f5d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/xbox_error_code_8015d000.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/zunipike.pdfIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_979f3f11763a4f99be8f72c24e644a6f.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_ff55792358a546a5a5afd85ea58493b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/nobosapagu.pdfIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_aeba00f63a274ebdb761cc16811aec7b.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_a8bae467ca0349d0bb42e0d724819d65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd20f8f-b8ee-4d4b-9609-f16ac8cf9945/epson_wf_2530_installation_wifi.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_49b4e9d6c7d14ea2a11b443ed74076cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d8ec8f7-c824-4d56-979e-9bfb91cb6ebc/dazujalafulupuzunoluvakub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc050dfd-3f40-4268-8806-8a1050f5921c/73272475424.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/47182046245.pdfIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_417c5859c05a404bb30c47758cc909df.pdf?index=trueIn PDF document text
    • http://pedirite.onlinewebshop.net/fefuxakaseje.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_6b951bc438544f68b80ed55634400798.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/20133235019.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_off0000ed5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 5592 bytes
SHA-256: efa3cb64099712cd4257a4e98ec18783467591c681012ec7e068d94f86005cd8
font_01_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 10864 bytes
SHA-256: faeac41847f4802f6ff6f0e5537718347caf1c04ec3a3fdcf674114e27bc9112