Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c47cbd04b785a9…

MALICIOUS

PDF

75.2 KB Created: 2021-03-17 23:27:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4b2fd85bf7e7ea8966ef9fa368b1cb SHA-1: eb320c1287244eff0e296e57d2cd8d3e5fc60910 SHA-256: 63c47cbd04b785a9d8860eb5e027f1122a1bdd977f65c29167b760fda6ff32bd
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number intended to trick the user into calling for support or to resolve a fake issue. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit the user through social engineering, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=kentucky+natural+resource+jobs
    • http://nijaxubazaziw.mypressonline.com/fejutubipemegusoxove.pdf
    • http://lozejebivo.scienceontheweb.net/xenefufozal.pdf
    • http://pevojatinolotej.22web.org/soccer_fitness_training_program.pdf
    • https://static.s123-cdn-static.com/uploads/4369142/normal_60074f508ba94.pdf
    • http://igafnd.org/24340931222mpbw.pdf
    • https://cdn-cms.f-static.net/uploads/4414869/normal_5fd5f6b63c9ea.pdf
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5ff16e5547e00.pdf
    • http://zinepifulew.22web.org/canton_fair_2018_exhibitors_list.pdf
    • https://cdn-cms.f-static.net/uploads/4365661/normal_60365d19ce1d8.pdf
    • http://jefafagigovaga.iblogger.org/advanced_trainer_six_practice_tests_with_answers_free_download.pdf
    • http://shopyou.online/3_roller_pipe_bending_machineep3z0.pdf
    • http://xutefizil.getenjoyment.net/pefosejoboxemejoko.pdf
    • http://keksik24.ru/cuanto_es_150_gr_en_cucharadask83a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kimone/clarinet_jazz_music_sheet.pdf
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_274ed514783647eba2c0ddb0b1426550.pdf?index=true
    • http://wujobenitu.epizy.com/phillies_schedule_2019_promotions.pdf
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_ba15d1af8a55405881ae76e3ccfd94b5.pdf?index=true
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_5a13993377d44ac9b9ef67731f22ca73.pdf?index=true
    • https://s3.amazonaws.com/mutirexa/barisan_para_mantan_lagu.pdf
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_cf4b4041e0994dda850a5f571bab189e.pdf?index=true
    • 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_off0000e728.bin
ee3ac455a13dd900c19aafee9133a076e2f5b600c81c61e04ead67ecab63bc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 5144 bytes
font_01_sfnt_off0000f8c8.bin
ed8260d2a95e262aa76cdbe7a239b98249b427d6ec4fa503fbb53989028ea7f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 11084 bytes

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