Malicious PDF — malware analysis report

Static analysis result for SHA-256 512132e1c9bc4d1f…

MALICIOUS

PDF

69.5 KB Created: 2021-02-28 21:53:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f94ee2d194a13a208f1be3e81f84c8a SHA-1: 2eb50b8bd84c059ec2517303018835b6c4ad2faf SHA-256: 512132e1c9bc4d1f22731a71fe74e297e05fb246cda5c59eef93f2c7e64b212d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'kuzutuzo.ru', which is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into visiting malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=wheel+horse+snowblower+parts
    • http://mgacessoria.online/52442569152dzgzx.pdf
    • http://zijogeminevuxa.iblogger.org/antique_delta_band_saw_for_sale.pdf
    • http://about-fb-support.com/sonisojibol2ew.pdf
    • http://zavarivaemvmeste.ru/moen_kitchen_faucet_repair_kitmlaod.pdf
    • http://bu-markett.com/humor_y_amor_de_aquiles_nazoa_gratisbyts9.pdf
    • http://vijevejumozugim.sportsontheweb.net/33695048106.pdf
    • https://sigesibum.weebly.com/uploads/1/3/1/4/131438142/wirenavulo_posanuximuful_juzozam.pdf
    • http://mawifit.iblogger.org/3908321042.pdf
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/625945.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/putelekireza/elder_scrolls_online_tamriel_unlimited_guide_book.pdf
    • http://manepiri.epizy.com/7292497593.pdf
    • https://s3.amazonaws.com/xoxaneral/61681164342.pdf
    • https://s3.amazonaws.com/wulotugadag/yola_semedo_ft_carlos_burity.pdf
    • http://rorazizaxaf.atwebpages.com/air_force_1_shadow_pastel.pdf
    • http://tuzipani.rf.gd/tirofipaxur.pdf
    • http://wonanikapudidak.atwebpages.com/diablosport_intune_i1000_vehicle_list.pdf
    • http://tapoloferazuziw.atwebpages.com/suzunilifejonoworokavan.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_off0000d4c6.bin
b410cf27a524fa9d6e76e4e4da0b4b01041e5c150016f41fff53f3c4957d13da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C6 5152 bytes
font_01_sfnt_off0000e655.bin
9c4fbaf49ab5b06f79e5d8968ca5f0eea64dccbb0828c03625f17b9edaf38f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 10132 bytes

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