Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3a14434e265dd9…

MALICIOUS

PDF

78.6 KB Created: 2021-06-09 08:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146df421ae57c202a7c13683435c1ea0 SHA-1: 7d106d62a81d3a7cd1551906ee81bd8f885966e3 SHA-256: cd3a14434e265dd93f594f0d34fa544512d938bf6768019fff95f8c55da97a6d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/pbw?utm_term=2019+cvo+ultra
    • https://cdn-cms.f-static.net/uploads/4423454/normal_606cc3e07a56b.pdf
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fc859bacc161.pdf
    • https://static.s123-cdn-static.com/uploads/4459937/normal_5fe26a968abc9.pdf
    • https://cdn-cms.f-static.net/uploads/4443803/normal_6013bf6959555.pdf
    • https://cdn-cms.f-static.net/uploads/4380082/normal_602859290ee21.pdf
    • https://cdn-cms.f-static.net/uploads/4481528/normal_60c04102b2ff2.pdf
    • https://cdn-cms.f-static.net/uploads/4490367/normal_60630e7928147.pdf
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5ff679f2c50aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6cdf432e-47b1-493c-9f20-6a702cfbebb9/dino_crisis_2_pc_game_free_download_full_version.pdf
    • http://wikifuvuz.pbworks.com/f/30919353345.pdf
    • http://pivumiraw.pbworks.com/f/garena_aov_mod_apk.pdf
    • http://kevuxezedila.pbworks.com/f/lavekelim.pdf
    • https://uploads.strikinglycdn.com/files/2ebc5c9e-9a4c-4a29-8294-352f9c082863/line_6_spider_v30_amp_settings.pdf
    • http://guvevef.pbworks.com/w/file/fetch/144743637/75081777531.pdf
    • http://zivovot.pbworks.com/w/file/fetch/144657591/how_to_empty_tray_on_foodsaver_v3460.pdf
    • http://debitagemi.pbworks.com/w/file/fetch/144848154/26226261308.pdf
    • http://sakulibur.pbworks.com/f/situgujovenavel.pdf
    • http://gugatodoka.pbworks.com/w/file/fetch/144776796/introduction_to_automata_theory_languages_and_computation_exercise_solutions.pdf
    • https://uploads.strikinglycdn.com/files/e14448cb-5379-4beb-99d4-06651428ebf1/nuance_power_advanced_download.pdf
    • https://uploads.strikinglycdn.com/files/5df82e1b-21d7-4a11-ab55-c567462d6cbe/46632285300.pdf
    • http://marutipug.pbworks.com/f/descargar_la_biblia_de_america_gratis.pdf
    • http://minuwaxiper.pbworks.com/w/file/fetch/144506442/how_to_set_up_wallpaper_on_two_monitors.pdf
    • https://uploads.strikinglycdn.com/files/a6d61004-24b0-4a01-b56d-9a18250ebbbe/wivanotipakeripevenuzoke.pdf
    • http://xelivolofuso.pbworks.com/f/xumuregafosobibaxewope.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_off0000ee24.bin
dff40ecff00a5528d4ffc55a1740d5a4a4f25166e2af59960d09539271eec3a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 5064 bytes
font_01_sfnt_off0000ff73.bin
88d0615e913b6eb3214672e065ee6d5835f32ee185c346777331a99b82f5d443		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 14120 bytes

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