Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d4c610bb3cda8e…

MALICIOUS

PDF

73.8 KB Created: 2021-03-25 12:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aefef79cc9040bb89727cc97652852bc SHA-1: 5d7cc385423b87a4675866001c0928cddc3c860a SHA-256: 39d4c610bb3cda8e4b51e2aa73362fcea1d366786f57ed5e7efa9fd7bc08fd75
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'baarspo.ru' suggests a download lure, likely to deliver a secondary payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' further supports the idea that the document is designed to trick the user into downloading and potentially decrypting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/award?keyword=manual+cade+simu+v3+pdf PDF link annotation
    • http://jajemojotodi.iblogger.org/asme_b16._5_flange.pdfIn PDF document text
    • http://hermidkovo.info/a_tale_of_three_kings_commentaryzowg2.pdfIn PDF document text
    • http://marketitaly.pro/41223024029i4qub.pdfIn PDF document text
    • http://bobixuposu.22web.org/guia_gina_asma_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rebomedug/94461888706.pdfIn PDF document text
    • http://rozibililev.epizy.com/manasolunujipefuginuj.pdfIn PDF document text
    • http://mimodiko.epizy.com/73821776111.pdfIn PDF document text
    • http://betupaxomivokab.epizy.com/56716959243.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/zuzaravorefebiw.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/user_manual_for_whirlpool_oven.pdfIn PDF document text
    • http://kovudefimure.rf.gd/sales_process_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/17815314172.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/cute_baby_photos_images.pdfIn PDF document text
    • http://rerivumisiso.rf.gd/atresia_y_estenosis_esofagica.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/man_with_the_golden_gun.pdfIn PDF document text
    • http://kedixiravupit.epizy.com/sunawur.pdfIn PDF document text
    • http://patesosiw.epizy.com/39764919724.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/xuvozunajagowumumun.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/formule_1_cafe_uitzending_2019_bijwonen.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/36961479390.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 5436 bytes
SHA-256: 2ccca415b01bd137dc4fc51979f83be2823ab10eddc2c8da7e22a33fede0a968
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 11548 bytes
SHA-256: f1781a2f9c8621bf9ade5bf0e830e825e59dcb0f66ec84edc279c0f6f7e7cc71

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