Malicious PDF — malware analysis report

Static analysis result for SHA-256 71251736cfefb2c3…

MALICIOUS

PDF

72.6 KB Created: 2021-02-28 07:22:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c641dc80eb9020d9ad069725b10a6ab SHA-1: 2e8da347499d1a5739b1d1705eab66209d1d3744 SHA-256: 71251736cfefb2c3c8a992e966d96803f5eba1f04abfc2dc5d2b2a16e97ae3cf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that likely serves a malicious payload, disguised as an installation guide. No scripts were extracted, but the presence of an external URI suggests a downloader or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=all+the+mods+3+install+guide
    • http://zdorovienashevse.xyz/nujiwiwutejomifanefiz6917i.pdf
    • http://fishland.store/wekogubinujibilv3bx.pdf
    • http://changely.club/31442229346ab97q.pdf
    • http://setlyb.online/checkers_restaurant_maryland_menulrfjj.pdf
    • http://guwizerawefoke.iblogger.org/16626688623.pdf
    • http://themarkuzmusic.com/buku_belajar_sahamoqfii.pdf
    • http://goromeo.club/windows_xp_bootable_usb_iso8vafr.pdf
    • http://getporte.xyz/wd_my_cloud_software_for_windows_7kvhnx.pdf
    • http://deflecfcvy.best/base_smart_home_systemsjkws5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lesizemub.epizy.com/49708569188.pdf
    • https://s3.amazonaws.com/jarirotexab/84457258994.pdf
    • https://s3.amazonaws.com/kozewuposoridil/ctonurie_sans_glycosurie.pdf
    • http://semiwexojexudu.epizy.com/55562906924.pdf
    • https://s3.amazonaws.com/tuxexi/rear_view_mirror_camera_user_manual.pdf
    • https://s3.amazonaws.com/tuletivotarupu/lokajoxesenava.pdf
    • https://s3.amazonaws.com/lanorolowu/jizeri.pdf
    • http://lidekajemunow.epizy.com/longman_dictionary_for_windows_8.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_off0000dffc.bin
613124afff43cabee49a72604d8664c8e80c46bbba5286f6cd01d34b6217a7f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 5296 bytes
font_01_sfnt_off0000f1d9.bin
1075279f238bcdf9a18c319db406b43b79dfb8b78a07836e5c0945337bb46047		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10548 bytes

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