Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7b817823e0f623…

MALICIOUS

PDF

100.3 KB Created: 2021-04-02 15:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed7cf8424fa85e47e9e050aa812a4741 SHA-1: 3111b18bc4e0e495f8befb2d702e7709ff9e3764 SHA-256: 4e7b817823e0f623602a5ce2784a48839f6ff7553f21ca464a64a414fc1c3fff
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=gellert+grindelwald+in+fantastic+beasts+1 PDF link annotation
    • http://lasinonid.iblogger.org/filasafojotoziwudejitug.pdfIn PDF document text
    • http://kevexupivuzovif.iblogger.org/ridonojulujavuroxifiguwi.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/jhagujc/movistar_play_ecuador_iniciar_sesion.pdfIn PDF document text
    • http://nikecortez.net/23708767347x2m3i.pdfIn PDF document text
    • http://daliadiago.com/payment_slip_sample_sahm8t.pdfIn PDF document text
    • http://smm-target.ru/cal_spas_parts_listyy3a3.pdfIn PDF document text
    • https://dawutika.weebly.com/uploads/1/3/1/4/131407504/befasokav.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/9ggEijB/9_months_in_weeks.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/jaQjaha/91596513347.pdfIn PDF document text
    • https://kisotupojez.weebly.com/uploads/1/3/4/4/134493444/5234947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa1dfad-8aab-43f5-842e-78041d08d12e/30185393058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f512ae-2c08-43fa-9dfb-3e7f6e5d0855/datoku.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/mera_bhola_hai_bhandari_new_bhajan.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/90648356344.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/carnival_of_venice_trombone_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/45090754163.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/wozuxexasudakezovovo.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/xbox_360_controller_battery_pack_gamestop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620d678f-7d06-4a2d-afbb-1698630d4b4b/operations_management_mcgraw-hill_series_in_operations_and_decision_sciences_12th_edition.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14689 5504 bytes
SHA-256: a06e4ea9011e2471188211d98e159d440767108baf096e562fefa210c826254e
font_01_sfnt_off00015971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15971 12852 bytes
SHA-256: 69fb2986393e179aa411de21fe095bd98fb0e07b5331e1e9be97ade36e6b1f23

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