Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c1f9f408d6b68d…

MALICIOUS

PDF

85.2 KB Created: 2021-03-23 19:57:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d7151c35c068de7ddfd20dbc44d8a0c SHA-1: a6f6c4f3ce8d64f573abb44ba305a657336418d6 SHA-256: b8c1f9f408d6b68d751370ba5e2e1028d9328184c61bd5e86f9b1c361f3fde2b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as a product manual. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL `https://kuzutuzo.ru/wix?keyword=sandisk+jam+mp3+player+manual` is the primary indicator of this lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://kuzutuzo.ru/wix?keyword=sandisk+jam+mp3+player+manual
    • http://lnstagramverifiedsbadgeforms.com/the_secret_language_of_birthdays_gary_goldschneider_free_downloadqosyn.pdf
    • http://sikalaporaka.22web.org/bull_shoals_lake_walleye_fishing_guide.pdf
    • http://scotiaenlineape-personas.com/how_to_work_cricut_expression_2k8ulh.pdf
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fcbd8279ae13.pdf
    • http://mebets.xyz/how_to_fix_a_ds_charger_portyb4kx.pdf
    • http://7lessons.site/65865282477mqugn.pdf
    • https://cdn-cms.f-static.net/uploads/4418381/normal_603540843105d.pdf
    • http://edayafar.xyz/fuzixiruyjoq.pdf
    • http://findattime.com/arduino_uno_software_downloaddx9f2.pdf
    • http://life50it.pro/pesalotafiwonoxeq9w8z.pdf
    • http://it50disconto.pro/gekiri3zxu5.pdf
    • http://midosiw.22web.org/86921808434.pdf
    • http://vofitoweba.22web.org/all_banking_related_terms.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_6028b11c20ce4.pdf
    • https://cdn-cms.f-static.net/uploads/4409110/normal_6019528f534d6.pdf
    • http://idealicacolumbia.site/nozavatijameguxevu6j57i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobovunoberiki/dirt_devil_endura_max_assembly_instructions.pdf
    • https://s3.amazonaws.com/janodojivi/zixonadugijedod.pdf
    • https://s3.amazonaws.com/gonima/nubikexosuwexilopi.pdf
    • https://s3.amazonaws.com/baxunaf/complete_linux_command_line_cheat_sheet.pdf
    • https://s3.amazonaws.com/wewiro/data_analysis_excel_chromebook.pdf
    • https://s3.amazonaws.com/gonima/azure_vm_diagnostics_arm_template.pdf
    • https://s3.amazonaws.com/folexapurilowe/zikezegikefog.pdf
    • http://robogotut.epizy.com/punokapedatisuzu.pdf
    • https://s3.amazonaws.com/gazivemon/kosuxifu.pdf
    • https://s3.amazonaws.com/wejuvono/8781298178.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_off00010b40.bin
6eb5b857fd7d5c06a78b34959fe66f5956a5155b05c8e4bcc14ad9d2e1150b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B40 5612 bytes
font_01_sfnt_off00011e54.bin
37562ca2a3bac5134589e3811f724bb4d37ae55af66aeb407818abeaa2a35aa7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E54 12060 bytes