Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1c072ee46044be…

MALICIOUS

PDF

210.0 KB Created: 2021-03-13 14:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2634ea3e0bb6e3fa430e49925930ba0e SHA-1: d0bb26a11695e6733eea973f024a32a5e23d00c1 SHA-256: be1c072ee46044be0908b62121df9c7e05b4de43481e9d7b7b1a210ee66baa66
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URL, 'https://leonvi.ru/award?keyword=nj+transit+bus+schedule+197+pdf', which is likely used to redirect the user to a malicious site. The document body, though heavily corrupted, appears to contain text related to 'Nj transit bus schedule', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9793

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://leonvi.ru/award?keyword=nj+transit+bus+schedule+197+pdf
    • https://konevolog.weebly.com/uploads/1/3/1/6/131606720/vomanaxosojivumeme.pdf
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/2129253.pdf
    • http://dream-stat.ru/popping_bubbles_in_resiny83mt.pdf
    • https://cdn.sqhk.co/rixutixim/dgQihhg/tomandlorenzo_mad_style.pdf
    • https://lolovegadagofi.weebly.com/uploads/1/3/1/6/131636941/cd19e04.pdf
    • https://jumirugefof.weebly.com/uploads/1/3/3/9/133997886/560003063e.pdf
    • https://cdn.sqhk.co/nogugojuri/ihhahhz/craft_warehouse_kennewick_coupons.pdf
    • https://cdn.sqhk.co/xonaruvipiti/IHiejhe/25643260016.pdf
    • https://rowexajezer.weebly.com/uploads/1/3/0/7/130776500/7145233.pdf
    • http://xtreme-sport.ru/verbs_for_each_level_of_blooms_taxonomycb84z.pdf
    • http://gexedufez.22web.org/partes_de_un_motor_elctrico_simple.pdf
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/kobigiwowanulomam.pdf
    • http://paypallsecurity.com/careers_wildlife_management_student_worksheet_answersmztfs.pdf
    • http://gelchlen.fun/8497350410h16b3.pdf
    • https://cdn.sqhk.co/sifilefu/YFhg6hh/60988175470.pdf
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/budabaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nenumezamotimi.epizy.com/sosimo.pdf
    • https://uploads.strikinglycdn.com/files/10f0e4fc-e119-4742-9892-dc32b6a766c9/carl_jung_theory_of_archetypes.pdf
    • https://uploads.strikinglycdn.com/files/9e928a82-d1ef-4ee8-8967-36338d24016c/how_did_the_alliance_system_lead_to_the_start_of_wwi.pdf
    • http://dimebuturerab.epizy.com/game_archery_mod_apk_revdl.pdf
    • http://kogosiji.epizy.com/xoxudatalovedix.pdf
    • http://fasipubaweguguf.rf.gd/efficiency_of_transformer_lab_report.pdf
    • https://uploads.strikinglycdn.com/files/b39e2c67-6f70-4111-b99f-8e6c752cc0fc/ruger_sr22_accessories_canada.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_off0002ff33.bin
ad8ac81723c67bb1048a3467d0572cf1dd5a6425a08472d3288861e29621b755		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF33 5716 bytes
font_01_sfnt_off000312aa.bin
ba95f58d59d80487a61e8251a76f3fbd9e43d2bc03f6a3b01b714888da921ea4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x312AA 10816 bytes

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