Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0c7babaf12f68d…

MALICIOUS

PDF

70.2 KB Created: 2021-01-21 01:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 69e564c4c0f41160f55d9e0500cb9850 SHA-1: 9fb69f707ec9306f98eed9c18075ec29451b1be6 SHA-256: 3c0c7babaf12f68d7e1167c1969ebe4251e39b7f72c55541b0cb088ac963cd92
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URIs pointing to disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/aws?utm_term=gerunds+phrases+as+subjects+and+objects+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409806/normal_5fdb7e4a56a36.pdfIn PDF document text
    • https://site-1245332.mozfiles.com/files/1245332/fojirateduxamux.pdfIn PDF document text
    • https://site-1168276.mozfiles.com/files/1168276/jixinanagetobodezugebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409827/normal_5ffc488b98d66.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/jiijgjb/lebara_mobile_internet_balance_check_code.pdfIn PDF document text
    • https://site-1173734.mozfiles.com/files/1173734/107_bus_schedule_nj_transit.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/xuvuvenumoni.pdfIn PDF document text
    • https://site-1243298.mozfiles.com/files/1243298/apc_back-_ups_550va_manual.pdfIn PDF document text
    • https://site-1178831.mozfiles.com/files/1178831/93177232197.pdfIn PDF document text
    • https://cdn.sqhk.co/divekezor/iaie9id/jixidedoxugi.pdfIn PDF document text
    • https://site-1249586.mozfiles.com/files/1249586/descargar_audiosurf_2_para_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd641976d2cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465386/normal_5ff1d12cea3fa.pdfIn PDF document text
    • https://site-1175497.mozfiles.com/files/1175497/aptitude_tricks_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_6007aac0558c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f9f1204659bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gomaxod/spanish_worksheets_greetings.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/basics_of_stock_trading_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/crystal_reports_designer_for_visual_studio_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/buzotoba.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_off0000d1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BE 5532 bytes
SHA-256: 5a114ef654cd6f30b03e5de7485389615d1134d146f566474e2b9b387765b88c
font_01_sfnt_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 10844 bytes
SHA-256: 32bf90f00135582968fd58262bab42accd65d1665db568287df09c4bb8b1d4f3

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