Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a938d75a08d9f3…

MALICIOUS

PDF

72.2 KB Created: 2021-03-22 18:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d71503029d35051bc181f14de37efd75 SHA-1: 79f4db0f967290356c3fc73037dbe7bed134c7e0 SHA-256: 92a938d75a08d9f34a286a39858e97cad395e02bb68d00b3df0ba996660d61d8
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The embedded URL `https://kuzutuzo.ru/aws?utm_term=simmons+sd7pk+power+supply` suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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/aws?utm_term=simmons+sd7pk+power+supply
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5fc827619b8fb.pdf
    • https://cdn.sqhk.co/wobimore/ha0hchc/mipamar.pdf
    • https://cdn.sqhk.co/juwafajem/slCIihh/word_up_vocabulary_pro_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe227241d60d.pdf
    • http://startbastar.online/moonlight_sonata_easy_piano_chordswy4qp.pdf
    • https://static.s123-cdn-static.com/uploads/4382793/normal_5fc6f1979d360.pdf
    • https://cdn-cms.f-static.net/uploads/4426686/normal_6012c3e2f3f94.pdf
    • http://sarhello.online/fazafilifaxujusatudcnvyo.pdf
    • https://cdn.sqhk.co/kagumuzom/hjhjDe4/62469962928.pdf
    • http://mnatural.space/kuteritarikusodisixemisamiafp.pdf
    • http://mstmail.space/free_movies_2018_utorrent4jm42.pdf
    • https://cdn-cms.f-static.net/uploads/4427267/normal_600c886528346.pdf
    • http://fbdirect.site/sorezasoluvikoso43kv.pdf
    • https://cdn.sqhk.co/fugovigul/BgfLqii/defense_zone_3_ultra_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4409992/normal_6024cda4e49f8.pdf
    • http://shtangye.xyz/madeline_book_seto1ej7.pdf
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fc62f25f132d.pdf
    • http://particuliers-societegenerale.xyz/debogukofotepeladi011od.pdf
    • http://doordash.link/gigabyte_z370_aorus_ultra_gaming_motc69m1.pdf
    • http://megatorg.ru/what_kind_of_oil_does_a_honda_2000_generator_usequq72.pdf
    • http://buytoday.cc/55570356033kuxij.pdf
    • https://cdn-cms.f-static.net/uploads/4450038/normal_602af8980b463.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_aa5befe2de73436a949fe8491cec585c.pdf?index=true
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_8c6842ef224f4185992d1b6287efc7e5.pdf?index=true
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_90affe2820b9464f9b8bd7544a959108.pdf?index=true
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_0cc6ce187fcd45138bf610846e2c3bd5.pdf?index=true
    • 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_off0000d944.bin
b0b991e20b3c1a31cab58afb52007b29bd1ffb5503d0a38661276c154b6bd0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD944 5336 bytes
font_01_sfnt_off0000eb76.bin
36577e13c56ba97d830b5efcc9336805c50ed2c78536f74693aec57f6aedabbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 11288 bytes

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