Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82a84caf9781732…

MALICIOUS

PDF

74.9 KB Created: 2021-03-12 06:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6b730e7e24619ba77e92eaea7090a784 SHA-1: 5b89ce4b4cccc77422582fd4b2f5426702d1bbc7 SHA-256: f82a84caf9781732bf18cba5423b4058a4094248ecfdf16be45ed7291b6beef5
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/award?keyword=bushcraft+101+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/kawurefeki/hdgijfg/starfish_cactus_images.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/VnmigFp/red_alert_2_remastered_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvepiwedo/bjasCgd/rufekadizatuvidirat.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/jagejhQ/54019557300.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/BNNgc5d/96812107814.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/gcicifU/luxapunuxutis.pdfIn PDF document text
    • https://tejiwubatimi.weebly.com/uploads/1/3/4/8/134899102/1da91f633815a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_5fda12f56975e.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/eywYSjg/dude_theft_wars_open_world_sandbox_simulator_beta.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/ghbomOo/weather_forecast_near_me_tonight.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/09ctji0/knives_out_house_floor_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/g7Hqe19/top_100_pop_songs_of_all_time_youtube.pdfIn PDF document text
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/laxowamazok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fd88ddd60a83.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wizidimawag/anjali_anjali_pushpanjali_telugu_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/89231202634.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/lapuvujivakarufigi.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/curriculum_vitae_word_templates.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD838 5424 bytes
SHA-256: b04c24d8a9fa39c774c830727e47cc8069f0371ca4aee8a284683eac679c0060
font_01_sfnt_off0000ea9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9B 10448 bytes
SHA-256: 302d013d648982169d6a5e4a4f0f9940c0beee17b6223d9de84a9d8650920730
font_02_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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