Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de5aceda53e39f5…

MALICIOUS

PDF

72.0 KB Created: 2021-01-12 22:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a1553d70f56c8fa31084666a2aecbdef SHA-1: 7d75a115bc9e3cce647b8d421cfdce51861c671b SHA-256: 6de5aceda53e39f5ace00191513729e6a7372067a35d8d0e8739ca18e4ad9ba2
134 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including one pointing to 'traffnew.ru', suggesting it may be part of a link farm designed to redirect users to malicious content. The presence of a download button lure further supports a phishing or malware distribution scheme.

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://traffnew.ru/123?utm_term=the+diamond+minecraft+horror+map+i%2527ve+ever+played PDF link annotation
    • https://cdn.sqhk.co/kurafuso/al1gWge/layton_drag_box_paver_for_sale.pdfIn PDF document text
    • https://site-1168112.mozfiles.com/files/1168112/dashboard_switch_symbols.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/lhpiaum/33242273353.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/Qsggcg0/fokepeboxuwomurete.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/eWhagca/gusotafexaz.pdfIn PDF document text
    • https://site-1233507.mozfiles.com/files/1233507/employee_provident_fund_form_10c.pdfIn PDF document text
    • https://site-1206062.mozfiles.com/files/1206062/larelizapigimimon.pdfIn PDF document text
    • https://site-1178683.mozfiles.com/files/1178683/parijegefosutejuwepul.pdfIn PDF document text
    • https://site-1173456.mozfiles.com/files/1173456/zezasirarulutiviw.pdfIn PDF document text
    • https://site-1175348.mozfiles.com/files/1175348/my_pictures_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/g2gfZru/gevidozosafozemakir.pdfIn PDF document text
    • https://site-1173244.mozfiles.com/files/1173244/the_information_subscription.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/senodiw/strategic_management_case_study_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/62944030625.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/resignation_letter_sample_template_doc.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_off0000df89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF89 5364 bytes
SHA-256: 36c0a3bbaf3c7837d62785f732772b017523b888fe674025896c5d988c430551
font_01_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 9696 bytes
SHA-256: 8438b0f4048efff2eefd6c7cfc11791f25572b2d659a430e29e373d870e82fbd

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