Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e6df1440404804…

MALICIOUS

PDF

79.2 KB Created: 2021-03-18 02:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88cc46ad4a2f1679af2871fba8c8f17c SHA-1: 2003ee881aa5bd26e02a043c045b6ae4063c6135 SHA-256: 26e6df1440404804c5d2206f8fd51bee22d82a4e9656f4dc0258df6f94769017
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing. The document body, though heavily obfuscated, contains text related to 'five nights at freddy's game free unblocked', suggesting a lure to attract users searching for this content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=five+nights+at+freddy%2527s+game+free+unblocked
    • http://rotelebi.22web.org/weather_report_in_mumbai_live.pdf
    • https://cdn.sqhk.co/fifusaji/alfifhc/79389023058.pdf
    • https://cdn.sqhk.co/raxasumo/ehijdXY/7784604070.pdf
    • https://cdn.sqhk.co/feduvefas/iggfjd9/applescript_messages_event_handler.pdf
    • http://wiwerij.iblogger.org/20564361771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_57a85fd7d9ad492dbd471e6722a831df.pdf?index=true
    • https://uploads.strikinglycdn.com/files/09cb9240-b856-41e0-8e3a-6539b0750195/32295652175.pdf
    • http://wujebewemifilav.epizy.com/ruger_p95dc_ejector_problems.pdf
    • https://uploads.strikinglycdn.com/files/610597d9-4eff-46c0-aad3-a448df0fe22c/46549839752.pdf
    • https://uploads.strikinglycdn.com/files/95399ac5-1147-4f21-84b3-8a98242ba809/nimefowuv.pdf
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_43b4865ac0a5417ca9549a10047f428b.pdf?index=true
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_eac26e424e154ccf8461ad02a99756a2.pdf?index=true
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_7d544014638e4ed0a2de309142e8ab37.pdf?index=true
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_d3bc536f27a743bc86fb0516b3cabb8c.pdf?index=true
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_827bfab4d5d44b0faa2f046ca0db96d2.pdf?index=true
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_a9b9dc6af08f4b87ba560b41d18f51d7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3571fc41-83f0-451a-b8e4-0ad7c3d2f6cb/viwulefa.pdf
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_52abea462739466cb88562a22bd0e78e.pdf?index=true
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_5a7fb8344d6f4994afce6dbf06210f8e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95ed11fd-0b9f-4b21-b5b5-031e290b8cff/can_you_have_free_will_and_predestination.pdf
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_969adac9824f4b9086484b10e79befe2.pdf?index=true
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_b9327f272ba04d4ba2974a69f832b600.pdf?index=true
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_85f30e8fd8954cf3888b68fa36de5db4.pdf?index=true
    • http://daluxufugul.epizy.com/sky_sports_live_stream_apk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53b.bin
d4b50a7b1d0143436795425dddfed152d87a116d7302c5aeb822f4630920d72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 5788 bytes
font_01_sfnt_off000108e2.bin
a43c1bac0760571cfc11cbfb2c3a5a5295371f8159769d54869d14278a214fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 11044 bytes

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