Malicious PDF — malware analysis report

Static analysis result for SHA-256 2969328ea0e9e9b3…

MALICIOUS

PDF

71.6 KB Created: 2021-02-02 17:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da664f4adc97c19a12e7883b40a2ff2f SHA-1: b1a5195952ea87330d3e82128218a5dc7e00cf64 SHA-256: 2969328ea0e9e9b37d710cda9d81054a10042faab1609bdd700c7c2b0875a947
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least two identified as malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution attempt. The ML classifier also flagged the PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=restaurants+in+grapevine+california In PDF document text
    • http://crubr.space/soundhound_for_pcdcnf9.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/vanilla_wow_alliance_leveling_guide_20-_30.pdfIn PDF document text
    • http://alkostore.xyz/50028159282q9yll.pdfIn PDF document text
    • http://kittyplay.online/27899624942szos7.pdfIn PDF document text
    • http://bilapak.66ghz.com/30374454720.pdfIn PDF document text
    • http://mandarin-fruit.space/best_funny_videos_ever_in_the_worldwyz8w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_5fc945ae74eea.pdfIn PDF document text
    • http://idealica-italy.site/letumawomapoxejerave66fzk.pdfIn PDF document text
    • http://antonio-ita.space/download_game_uphill_rush_waterpark_racing_modbz6qg.pdfIn PDF document text
    • http://899themes-demo.ru/harga_menu_marco_seafood73137.pdfIn PDF document text
    • http://presentinsta.online/96664581438j4uvm.pdfIn PDF document text
    • http://tradebot.space/louisiana_purchase_and_exploration_map_activity_answersmaejt.pdfIn PDF document text
    • http://how2clever.com/bujezitafonovejodapufon5fjo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_600bb691c577b.pdfIn PDF document text
    • http://wgathering.org/adjetivos_y_pronombres_demostrativos_worksheet6hw0q.pdfIn PDF document text
    • http://chaptejvxz.fun/pathfinder_kingmaker_gm_guideklm0v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407756/normal_5fc656be50661.pdfIn PDF document text
    • http://smeshnoykir.space/23574228533zdr7n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banitazivi.epizy.com/green_revolution_upsc.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_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 5248 bytes
SHA-256: 7677fdbb890b43915d6b177384bebe3d4fa2ed22a6de5f8c3b5489e1b7862e76
font_01_sfnt_off0000ea4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 11792 bytes
SHA-256: 1ffffa948807d40d493a74da01f35a47b121d2cf6e679ed28ca96eb56d0472ff

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