Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5006df8c914cfb…

MALICIOUS

PDF

72.1 KB Created: 2021-04-14 17:33:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 822cd0ee9f37ca7b106520230ca4e481 SHA-1: 51f31936a418d3bb86836db40a7e184e2b3f24bb SHA-256: 9c5006df8c914cfbc296635bb41ad891d763f5f135a39a131e4a537d6247f579
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=geronimo+stilton+four+cheese+box+set+%2528books+1-4%2529 PDF link annotation
    • http://mizejodaf.mywebcommunity.org/sukivefibowulamekafi.pdfIn PDF document text
    • http://hallop.xyz/politik_identitas_adalahfcn46.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/biology_neet_notes.pdfIn PDF document text
    • https://rikumuxazomibib.weebly.com/uploads/1/3/6/0/136082685/2261472.pdfIn PDF document text
    • http://cccckkkkkdd.space/juvobesixi1lkjc.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/5f75e8ffb7.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/zumupede_sasuxututinik_zutevidibirafu_rufok.pdfIn PDF document text
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/xuzebe.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/75716278526.pdfIn PDF document text
    • https://wiwitubiz.weebly.com/uploads/1/3/5/3/135351816/nugosudu.pdfIn PDF document text
    • https://latujajadaf.weebly.com/uploads/1/3/4/5/134593938/bumibigaluveduserefe.pdfIn PDF document text
    • http://navalny.design/wexusepesofuwufid4cdiz.pdfIn PDF document text
    • http://prizinsta24.space/83398188243j9v34.pdfIn PDF document text
    • https://taxupati.weebly.com/uploads/1/3/4/8/134891344/darefobadudanag.pdfIn PDF document text
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/tutuxidape-matodowuxaxemis-votusopixivik.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/c8b9cdad-2025-4ae7-9f0c-2293c19a9e56/15838423904.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/geological_timeline_activity_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/50599612240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8bb9b2-3143-4802-a875-466c5ac286e8/61796603933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e14082d8-61ea-40f3-a9ed-84fbb1d3646e/3_point_perspective_drawing_cube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da4dbda-f85d-4b04-806e-5f7c1e30c60d/xomifepuji.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/jufiledom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b164e17e-46d9-4dda-8baa-2edf469a4683/joveveligokatabofi.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/rar_extractor_for_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/pc_study_bible_apk.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_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 5540 bytes
SHA-256: 029524810d8acab85360a643cb1286036b73904f02d5932f1d753f285292b809
font_01_sfnt_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 11276 bytes
SHA-256: e233f80dcfa3b0bf0c810a32d6b0b1594e479b255d2716d5b6ef2b97e0b79a80