Malicious PDF — malware analysis report

Static analysis result for SHA-256 d679beeac94992e0…

MALICIOUS

PDF

81.6 KB Created: 2021-03-18 18:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2679336b6e6c445b8ede33d3baeb82b5 SHA-1: 94c7a0e823b1de1e3f93315d35f2b6130a6ae9d4 SHA-256: d679beeac94992e081cd81fec5d8d3a63c5f87b4a2455fa863276aa79cdb54bf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=simpson+pressure+washer+hose+repair PDF link annotation
    • http://zabidegelid.iblogger.org/b_extract_form_tamilnadu.pdfIn PDF document text
    • http://jerusitujuj.22web.org/frigidaire_ice_maker_troubleshooting_guide.pdfIn PDF document text
    • http://tublitalia.space/83574987507d1eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_601468a5c6fd6.pdfIn PDF document text
    • http://normaa-id.com/cyberflix_tv_apk_firestick6p88l.pdfIn PDF document text
    • http://ributufukepun.66ghz.com/bluehost_email_server_settings_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422163/normal_6018e4ba57700.pdfIn PDF document text
    • http://mini-cam-v2.club/tecnicas_de_recoleccion_de_datos_en_investigacion_cuantitativaovovk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449615/normal_604a77a7c8227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506131/normal_6037d2e4341ec.pdfIn PDF document text
    • http://solent.bar/how_to_use_humphrey_visual_field_analyzerujdxd.pdfIn PDF document text
    • http://fonajon.22web.org/neramosorumupukugaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_85ff80daca74446b8f31422771a5c7ea.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_12b12cd20e5f48d997aeb0307cad4c6a.pdf?index=trueIn PDF document text
    • http://mibofive.epizy.com/broncos_injury_report_week_7.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_338b1132eee841c480f87841e94b4228.pdf?index=trueIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_0e8cae316e0f42b08a2b7d854360afc3.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_7a55580d313e4430963fc69bb8abc655.pdf?index=trueIn PDF document text
    • https://6184de0c-c318-42a7-882e-c5ddc63b817d.filesusr.com/ugd/1c8c1e_b7cc7f72a5bb402fbe9f9635a736606d.pdf?index=trueIn PDF document text
    • http://wezumowivixire.rf.gd/xetubolibe.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_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 5220 bytes
SHA-256: 2aeb1157bbbf57fdc6cdb6735bcbcb206630cc81fded7b9d0a09838954ae0044
font_01_sfnt_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 10752 bytes
SHA-256: 228a74ab0317d00da22be11cdf068f2cbcfc4a11df983828ba9fdb130a82c2d7

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