Malicious PDF — malware analysis report

Static analysis result for SHA-256 e678e342e507a529…

MALICIOUS

PDF

80.8 KB Created: 2021-05-02 01:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 082da9b12ff58df0efb78db95144d514 SHA-1: baa04147ce99b30d9f5849587d58d976a0b0df87 SHA-256: e678e342e507a529ad66e15e50ef798f29eec33869e4a486463a65698f2d3e57
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'kuzutuzo.ru', suggests a phishing or malware distribution attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=leadership+and+the+one+minute+manager+ebook
    • https://cdn-cms.f-static.net/uploads/4478146/normal_60668050d592d.pdf
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/mokanumonug-pagujetomigebi-sawopejura.pdf
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5fd8fa9d35a3d.pdf
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/527caee5a33fe.pdf
    • http://nawukebakesejid.iblogger.org/kogateduputalijepogepigek.pdf
    • https://cdn.sqhk.co/tixunudixa/geVrgf6/police_seized_car_auctions_nsw.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_600c80a665c2d.pdf
    • http://niwagiw.22web.org/whatsapp_status_saver_for_pc.pdf
    • https://cdn.sqhk.co/mivesumor/jfjiXgi/71918118666.pdf
    • https://static.s123-cdn-static.com/uploads/4426557/normal_5fcf6be43109c.pdf
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/3323278.pdf
    • https://cdn.sqhk.co/jenireni/aMghhjb/zombie_hand_sticking_out_of_grave.pdf
    • https://cdn.sqhk.co/zofizitene/gghdgh7/watch_friends_on_hulu_with_hbo_max.pdf
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/6055830.pdf
    • http://widevuvi.22web.org/filmic_pro_apk_2019.pdf
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/5504994.pdf
    • https://cdn.sqhk.co/fafojipedul/icQGia0/67398904721.pdf
    • https://zirodamabesad.weebly.com/uploads/1/3/0/7/130740068/2399551.pdf
    • https://teleroxekafi.weebly.com/uploads/1/3/5/3/135321942/8883434.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mojilobopage.rf.gd/circulatory_system_questions.pdf
    • http://fezexebu.rf.gd/coleman_heater_date_code.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_off0000eec5.bin
e5b8c3c88f1f354f99ba4491f9c63e898c20394a3e5a24f8803fa7fba1c55931		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC5 5368 bytes
font_01_sfnt_off000100d2.bin
7c45166977d35e81c710c3c7b2d3709c3de9398b7129ab14c73d9a077e1cc5d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 11344 bytes
font_02_sfnt_off0001278e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 4324 bytes

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