Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e40d0c248ace86…

MALICIOUS

PDF

68.0 KB Created: 2021-03-28 15:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e3f03b085a2b87ede39d80c9f71e8b06 SHA-1: c480c2c175036bab7617882d17503328673008fd SHA-256: 08e40d0c248ace86678ba60a5388aeb4ae55e33e1d38f78261f4d0899a666c6c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure malicious links within a large number of seemingly legitimate search results. The presence of external URIs suggests an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=analects+of+confucius+arthur+waley+pdf PDF link annotation
    • http://jawigonoputumun.iblogger.org/bsp_png_loan_application_form.pdfIn PDF document text
    • http://xusafinar.22web.org/ciencia_de_los_materiales_dentales_phillips_completo_gratis.pdfIn PDF document text
    • https://gamabisage.weebly.com/uploads/1/3/2/6/132681080/eff89e54a.pdfIn PDF document text
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/xenewuxekeb_zugud_dofido.pdfIn PDF document text
    • http://gutekixawa.22web.org/gatehouse_lock_manual.pdfIn PDF document text
    • http://lirerigoteses.22web.org/7439477228.pdfIn PDF document text
    • https://vojoritus.weebly.com/uploads/1/3/1/1/131164067/5f7dd3f242b.pdfIn PDF document text
    • http://bodulotol.22web.org/jebapususosoreb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://filabos.epizy.com/ferulolejavalil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77b9152-2e0d-4557-a729-3891e63d5706/55420370820.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/65482139081.pdfIn PDF document text
    • http://zawipikeg.rf.gd/79236002505.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/fobugabitekogisulewadomez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584e3420-a092-45a7-a4bc-1c6ae4cf5d09/how_to_pair_logitech_m325_mouse_to_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/determiners_worksheets_for_class_8_cbse.pdfIn PDF document text
    • http://tamedigozetot.epizy.com/blue_force_tracker_technical_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0e9bc6-a813-4a30-833e-91e1e7f18781/lg_linear_compressor_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/where_is_the_starter_relay_fuse_located.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/android_java_arraylist_vs_list.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_off0000cd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD15 5424 bytes
SHA-256: 76be6fa63b1d20a634d0de393900744017f31bb00fa96835d566eb8aae3baf29
font_01_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 10188 bytes
SHA-256: 2c4d39d1482fa19f32f5b2fa92853a4ef959c39495bc03b41d3b8b9abe768a4b

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