Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9e11bf59780e45…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 20:23:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f3026e43b874710d9c843f24585bfc8 SHA-1: 5fed9cb8a20e25251433414c49630e539c7a0cec SHA-256: 7c9e11bf59780e45ec1f60248cab4ecdfbfc0d976e230ac357b899ce622d8ff0
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely the destination for the phishing attempt. The document body, though heavily obfuscated, suggests a lure related to a 'bursary application form'. No scripts were extracted, but the presence of an external URI and the phishing classification strongly indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/award?keyword=foodbev+seta+bursary+2020+application+form+pdf
    • https://cdn-cms.f-static.net/uploads/4480749/normal_60321d5581df7.pdf
    • https://static.s123-cdn-static.com/uploads/4407085/normal_5fe4e5c1b0656.pdf
    • https://cdn.sqhk.co/pabefidinaz/y8g3jfr/leo_and_tig_2_game.pdf
    • https://cdn-cms.f-static.net/uploads/4417535/normal_6041ca2150f72.pdf
    • https://cdn.sqhk.co/takulowizi/f0Djjdb/16582164605.pdf
    • https://cdn.sqhk.co/xafiguzi/bhjB72Z/53766515209.pdf
    • https://cdn.sqhk.co/kixowijeka/8UiSCU5/paintball_3d_model.pdf
    • http://chtotakoevuxom.biz/2262653047394ynw.pdf
    • http://gijebuk.iblogger.org/live_net_tv_app_4._6_apk.pdf
    • http://qlemelest.online/statistical_mechanics_pathria_free_download6buh2.pdf
    • http://mmamba.ru/binding_the_strongman_free_downloadekldv.pdf
    • https://cdn.sqhk.co/lowanivari/ids3Ijf/good_pedometer_app_for_android.pdf
    • https://static.s123-cdn-static.com/uploads/4391620/normal_6003f9a46ae9a.pdf
    • http://gexomafe.mypressonline.com/rca_tablet_dvd_combo_car_charger.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://donopopasuxek.epizy.com/jimmy_neutron_lima_bean_monster.pdf
    • http://zedofaxuboz.onlinewebshop.net/volkswagen_service_center_near_hebbal.pdf
    • http://jimomug.rf.gd/aprendendo_a_tocar_violo.pdf
    • http://revupeponalewuj.epizy.com/lagu_carnifex_hell_chose_me.pdf
    • http://wozunitififut.epizy.com/cookie_sheet_cake_icing.pdf
    • http://lojupodinitaxug.epizy.com/sarkari_exam_group_d_answer_key_2019.pdf
    • http://tomisuvo.rf.gd/hairspray_script_mti.pdf
    • http://sinofemuda.rf.gd/2775308028.pdf
    • http://namulolitis.rf.gd/soda_5_crack_free_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_off0000efd8.bin
843014111fcfd6ccbe06d625b22c6145a0748ad41a39be595f6af288c01a66e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 5832 bytes
font_01_sfnt_off000103a5.bin
0aa2d9d6920cbc61b32ba042a1ba6e4e5e184755aabfda8f8ff111e094e899be
pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 10816 bytes