Malicious PDF — malware analysis report

Static analysis result for SHA-256 c739e3d166060a3c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-30 04:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b15120e7e87fc30ce3b67ca5db2112cc SHA-1: 1d31f702c0f8781851adb1bb47e9756c58b1265a SHA-256: c739e3d166060a3c6ec08e8bd2fbf118a693d3d95f89acd76dddb58af7a0c69c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=readiness+for+enhanced+family+process
    • http://levantegroup.net/how_do_i_reset_my_galaxy_tab_4_to_factory_settings5gl2h.pdf
    • http://sijiwepi.mypressonline.com/what_is_another_word_for_touched_up.pdf
    • http://favodokoleti.mypressonline.com/avaya_one_x_communicator_for_mac.pdf
    • https://cdn-cms.f-static.net/uploads/4473035/normal_5fd335535fda7.pdf
    • https://cdn-cms.f-static.net/uploads/4403266/normal_606023d614d29.pdf
    • http://vilopeg.xyz/97944426292vs26y.pdf
    • http://sajiwurejedetu.sportsontheweb.net/algorithms_and_complexity_book.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1d5e9c7b-1c54-4d5d-b269-54ce0f815e10/sub_zero_ice_maker_troubleshooting.pdf
    • https://uploads.strikinglycdn.com/files/ae456001-80e9-4cfd-8d8f-d199acf283d2/what_is_the_theme_of_the_westing_game.pdf
    • https://s3.amazonaws.com/tarajix/16205435665.pdf
    • http://tokewaperomuveb.epizy.com/telcordia_sr_332.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/are_honda_hybrids_reliable.pdf
    • https://uploads.strikinglycdn.com/files/e10e531f-8d0e-4f9a-bc61-468e8e609c44/russian_alphabet_song_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/e8feeaab-0c4e-45b1-a9d1-d1182ca6f8b0/boss_tuner_and_metronome_tu-80_how_to_use.pdf
    • https://s3.amazonaws.com/gurafoga/vanejizafixubazoliwopum.pdf
    • http://jelasojeb.rf.gd/7104637587.pdf
    • http://sedisukaviz.rf.gd/accounting_principles_11th_edition_free.pdf
    • https://s3.amazonaws.com/tomamujuf/86089325459.pdf
    • https://uploads.strikinglycdn.com/files/ed9b617f-80c9-4960-a980-6e2c08550958/vulajebesoroxafofepeba.pdf
    • http://merapenerabari.myartsonline.com/b_d_chaurasia_anatomy_download.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_off0000f745.bin
11b41425a1cdbf47cc5a87f6aa288b45ea749f2492d5cd04219a71bd4685f039
pdf-font-stream PDF embedded font (sfnt) at offset 0xF745 5504 bytes
font_01_sfnt_off000109e7.bin
4e09c2096f0670ccb545842be875cbfe77ac0b0f8f309e2c2042cf6c451a6ded
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 11496 bytes