Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ec0840ad0668d9…

MALICIOUS

PDF

83.6 KB Created: 2021-03-14 00:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4f4c8b25f6629838078f060aecee7d24 SHA-1: d817d2a3bb110f95a2e12d623261feef8127d7b4 SHA-256: a6ec0840ad0668d94e01f413d061d957da5da81a98db48abbc566d02f1bd427a
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=sims+3+all+expansion+packs+free+download+pc In PDF document text
    • http://sizijevoji.iblogger.org/school_display_letter_templates.pdfIn PDF document text
    • http://gexedufez.22web.org/korirumexed.pdfIn PDF document text
    • http://bcipreactivaperu.com/33322128764fgmtv.pdfIn PDF document text
    • http://potenciy.xyz/35452608105ygxxi.pdfIn PDF document text
    • http://opticsystem.website/wave_tom_jobim_sheet_musicmr5zq.pdfIn PDF document text
    • http://lelofewadu.iblogger.org/3886255377.pdfIn PDF document text
    • http://creditstar-kabinet.com/vifebedoguvevaxosiwila0k3fw.pdfIn PDF document text
    • http://rulogojaratimad.22web.org/population_definition.pdfIn PDF document text
    • http://geesecam.com/how_to_cook_brisket_in_a_roaster_oven4r0mq.pdfIn PDF document text
    • http://depalowivejal.iblogger.org/68187386743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubejatusir.epizy.com/annual_report_holcim_indonesia_tbk_2013.pdfIn PDF document text
    • http://bijasubibivov.rf.gd/auto_or_manual_mustang_gt.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/adaptability_definition.pdfIn PDF document text
    • http://xofuzugavup.epizy.com/49419992027.pdfIn PDF document text
    • http://bifobexa.rf.gd/dante_purgatorio_canto_xi_parafrasi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/iicsa_report_nottingham.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/final_countdown_cello_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/pharmacy_database_management_system_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/demovilutudopere.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/vocales_para_colorear.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/29323195949.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/toyota_camry_hybrid_2018_price_in_qatar.pdfIn PDF document text
    • http://jodekiwob.rf.gd/koxadafusedunuganukajo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 5792 bytes
SHA-256: f3f9677a67da61f4142714e70449fb825be470197777c4e34b43391828409dd7
font_01_sfnt_off0001012b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012B 12888 bytes
SHA-256: d002d0992b7c83dcc8d124da2bab29f5f61f1d1fa509939ef10612b74ee84891
font_02_sfnt_off00012b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B58 16232 bytes
SHA-256: cc032a1d7efe9f52c63bdca4360dad9aff78fb14a47167d9e0089e6cc9416013

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