Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd75f5c0658ffdf…

MALICIOUS

PDF

73.9 KB Created: 2021-03-24 10:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cd7a3ce0461b1ae53c252fb829ebfc2 SHA-1: d89ebb6d482fd489fd5564816a31ba8fcb6220f7 SHA-256: cdd75f5c0658ffdf95c52efd0814d0f3e6af74465c3a035915afc62c0078f3e4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://maypoin.ru/award?keyword=ante+nicene+fathers+volume+3+pdf', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing the document's role as a container for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=ante+nicene+fathers+volume+3+pdf
    • http://masalev.ru/lumitumalipunl21pw.pdf
    • http://mevobul.22web.org/steam_boiler_diagram.pdf
    • https://bupekotarox.weebly.com/uploads/1/3/0/7/130739944/2734407.pdf
    • https://masudokunu.weebly.com/uploads/1/3/4/7/134731157/rozasezonamoril_tenaxutovedigo.pdf
    • http://mipedinujit.22web.org/can_i_annotate_in_onenote.pdf
    • http://kegeminu.iblogger.org/2089635245.pdf
    • https://sobidoduwipiver.weebly.com/uploads/1/3/1/4/131406433/xunubetoti.pdf
    • http://blablablacar.online/nivorosutuow23u.pdf
    • https://zunuduzeguw.weebly.com/uploads/1/3/4/3/134344012/6438531.pdf
    • http://gusanod.22web.org/what_is_the_tone_of_chapter_2_in_the_great_gatsby.pdf
    • https://static.s123-cdn-static.com/uploads/4496582/normal_5ffe1b4b97fae.pdf
    • https://cdn-cms.f-static.net/uploads/4386363/normal_6010879f641f4.pdf
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/b7698b685f7505.pdf
    • http://eurofamily.pro/grange_park_primary_school_telford_ofsted_reportmefve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jezuguxefigowi.rf.gd/john_deere_310a_backhoe_manual.pdf
    • https://uploads.strikinglycdn.com/files/e327732c-dfba-4aa0-ac3f-b492bcaff2fc/last_wish_raid_free_chest_code.pdf
    • https://uploads.strikinglycdn.com/files/07b55c03-ffa5-4a59-ba3d-6f478ccff29b/64535677171.pdf
    • https://uploads.strikinglycdn.com/files/bdbd4bb1-3fe1-4996-8024-c16f747857f5/the_little_prince_short_plot_summary.pdf
    • http://fabowifomewod.epizy.com/12a_cartridge_spare_parts_name.pdf
    • http://filabos.epizy.com/98510244440.pdf
    • https://uploads.strikinglycdn.com/files/038f0023-12a3-4b36-b00f-704ccd267107/pisuk.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_off0000e4ff.bin
10d2233be887084f1b3f3d23a05f761b75595b00224bf1aad055ab8295eb1765
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FF 5608 bytes
font_01_sfnt_off0000f7f4.bin
a59a3d018133ba9af243175867f8005957bce3c8824b1e122464c631eba3e6ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 10088 bytes