Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada06f28c6bf5cfb…

MALICIOUS

PDF

79.4 KB Created: 2021-03-15 23:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3eea976094b680a535e2338eaba590aa SHA-1: ed5defb9a78cda89e78650811b3d5b607d0b85ba SHA-256: ada06f28c6bf5cfb53426727af2a3f84d49940e4ae6a9a6a8f1c1099e4010c06
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true destination. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lure users to external 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://mezovuduw.ru/wix?keyword=server+kad+emule+aggiornati PDF link annotation
    • http://dfwshootersupply.com/how_to_reset_ecosmart_tankless_water_heateriipl7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_602da6d02e79e.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/mavoz_nokobowus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416805/normal_6025b25a34dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447253/normal_601fb10eb8967.pdfIn PDF document text
    • http://wiregabjuk.fun/xijunotititakofipisifokyb7ue.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/529558.pdfIn PDF document text
    • http://qiwi-wallet.online/67774017038yrq4m.pdfIn PDF document text
    • http://helplnstagramoffice.com/badazugikutowmzlrg.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/welevalef.pdfIn PDF document text
    • http://forpost-electrica.ru/how_to_send_certified_mail_with_return_receiptcar3z.pdfIn PDF document text
    • http://stnold.com/99444578249vwgzy.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/e4d4ad92-7852-44fa-889a-bedd503b66d3/casio_g_shock_wr20bar_adjust_time.pdfIn PDF document text
    • http://fudedeki.rf.gd/kudalonedev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a2c865-7cf7-449f-879a-ef2229610f15/83952161420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c657b62e-acae-4f7a-a6b0-99962aea6081/purijukadedebawoxofanivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b652d287-e57f-4bdb-940c-ac1286939530/nolatopebutotozujolifas.pdfIn PDF document text
    • http://doruxexim.epizy.com/how_do_you_nail_a_competency_based_interview.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_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 5196 bytes
SHA-256: f8005cfc49206fea8095ca1155d2492f4b0f6ee6cc11977ed9ce28437806b8c8
font_01_sfnt_off000107fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FC 11916 bytes
SHA-256: 75fb960e6a369d86e44a871145ec5194381cafbe82f53d262d7e43fe4983b2f5

Open this report in the interactive analyzer, or submit your own file for analysis.