Malicious PDF — malware analysis report

Static analysis result for SHA-256 47643f9ac1561c7d…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 23:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69ea6235cd5f0a46cd2129c10c1687a5 SHA-1: 205586740da68e09fdeb7c9fb31f16ce00f060e3 SHA-256: 47643f9ac1561c7d18c3c4917ae0cf8a89be9c5b7207cd483e0e6a8c140ac469
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or serving a malicious payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=algebra+1+common+core+regents+june+2018+answers
    • http://lezobul.medianewsonline.com/13177244172.pdf
    • https://cdn-cms.f-static.net/uploads/4408197/normal_600f043b8f9ca.pdf
    • https://cdn.sqhk.co/rawatajizefu/ygfQgd6/how_to_buy_on_ebay_with_paypal_credit.pdf
    • https://cdn-cms.f-static.net/uploads/4366959/normal_6041c62dbfb0a.pdf
    • http://dofujifeluradep.medianewsonline.com/ligukorugefavoguvu.pdf
    • https://static.s123-cdn-static.com/uploads/4413697/normal_6006276b1a196.pdf
    • http://perfectiona.online/40503969038hywvl.pdf
    • https://cdn-cms.f-static.net/uploads/4415937/normal_600ca5cf2f979.pdf
    • https://cdn.sqhk.co/xidizizo/ajdWxHj/back_to_love_by_brymo.pdf
    • https://cdn-cms.f-static.net/uploads/4468296/normal_604f105a7ea24.pdf
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fefb684d59af.pdf
    • http://amin-ukraine.net/midoxezemibebakefewukevxok89.pdf
    • http://sentytld.online/zalupagenuwivalo980.pdf
    • https://static.s123-cdn-static.com/uploads/4403947/normal_5fc69da18e0b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/845e1628-3998-4626-84d3-75492e95ef32/which_green_tea_is_best_for_flat_tummy.pdf
    • http://jitawidavez.atwebpages.com/24312382550.pdf
    • https://uploads.strikinglycdn.com/files/f075aa85-48d2-4aa9-b76e-dc9bb5e24160/53813207950.pdf
    • https://uploads.strikinglycdn.com/files/1725d1b5-7bf1-4289-a68e-a2de1a4b0e84/the_little_red_hen_story_slideshare.pdf
    • https://uploads.strikinglycdn.com/files/159f42d0-5fe6-4ffe-b993-e1bdf737b782/dewalt_dw708_home_depot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e982.bin
5acec66d1a48bd0edc8b4a101dcf3783ddb7dc3b819428a68d97720a8f207a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE982 5772 bytes
font_01_sfnt_off0000fd27.bin
cdc3be4828e1ec1cc122c29a69bfdb344890038044a6062005ab874c43c11713		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD27 11548 bytes
font_02_sfnt_off0001248c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 4324 bytes

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