Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0c1963d8f191b9…

MALICIOUS

PDF

87.4 KB Created: 2021-03-22 05:27:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 832e166a08a172b285a64b73153f5020 SHA-1: 3437ff7d29e26584f454f2843bfa2e7d486e3839 SHA-256: 4b0c1963d8f191b92fa1264c710186ca841ca654b99fd273242f73fd3903d555
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains references that suggest a lure related to a game, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=advanced+pixel+apocalypse+3+unblocked
    • https://cdn.sqhk.co/texekikevow/hiG3hdc/alimentacion_y_nutricion_saludable.pdf
    • http://sijixobepavip.22web.org/wakasinuzaruw.pdf
    • http://fimunukowira.iblogger.org/40334941289.pdf
    • https://cdn.sqhk.co/lasumalena/ggHMDgf/19830429939.pdf
    • https://cdn.sqhk.co/nefakovuwot/xhbHFji/best_qr_code_scanner_for_iphone_7_plus.pdf
    • https://cdn.sqhk.co/wiwevini/ePN1hhb/64317748185.pdf
    • https://cdn.sqhk.co/dejumosemun/BPyhfWY/7628856767.pdf
    • http://bekowakiged.iblogger.org/7729012989.pdf
    • https://cdn.sqhk.co/geruxibab/hdcijj9/prospective_student_tour_texas_a_m.pdf
    • https://cdn.sqhk.co/javomekoru/xQhgJOc/mutibeko.pdf
    • https://cdn.sqhk.co/zolulesar/hdBVUic/jakosedulupimuv.pdf
    • http://tesopinafap.22web.org/povumapej.pdf
    • https://cdn.sqhk.co/tivanosox/vha29jh/januxulekedonezovi.pdf
    • https://cdn.sqhk.co/purovufizu/TjhTte1/jump_rocket_light_up_and_fly.pdf
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rifunasi.epizy.com/72148312268.pdf
    • https://s3.amazonaws.com/vuxalirudidel/xufunoga.pdf
    • http://botalibinizor.rf.gd/chorale_from_jupiter_piano_sheet_music.pdf
    • http://modabiwabilalu.epizy.com/62274987830.pdf
    • http://lubesugoninop.epizy.com/derivatives_of_ln_and_exponential_functions_worksheet.pdf
    • https://s3.amazonaws.com/dugibabafod/contemplate_on_something_definition.pdf
    • http://kakedujeruvos.epizy.com/39487268197.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_off00010d1a.bin
65adf09d757eb73ecd5b924d14e9c9842a532e4a35653d09605623f86054ba96
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 5560 bytes
font_01_sfnt_off00012026.bin
79c85132429b86fab99d37242d091c7a67155e847ae65a9932e73c097aa250dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 15204 bytes