Malicious PDF — malware analysis report

Static analysis result for SHA-256 863a0a1b4738968a…

MALICIOUS

PDF

91.8 KB Created: 2021-02-26 14:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 393e8ee79793cd4365f1e87a61bf7c23 SHA-1: b0e985c75e9fa96b4bf4d8d1ac13b836a24261ba SHA-256: 863a0a1b4738968a2e303dcbe12020629128540514693c3c3d4d24ae5d2194f6
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to `https://yafferge.ru/123?utm_term=types+qualitative+research+design+pdf`. This indicates the document is likely part of a phishing campaign or used to distribute further malware. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=types+qualitative+research+design+pdf In PDF document text
    • http://poverkavoda.website/potepexokufimuzufeva1nege.pdfIn PDF document text
    • http://jgndegs.info/mutitijenatoxibagigt71q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_6027a599aa89d.pdfIn PDF document text
    • http://radanews.site/88757827377vx5jx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469374/normal_600d461479545.pdfIn PDF document text
    • http://yewes.fun/xetikejidoseroferovu6tkxv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_601dc9d6c0cc7.pdfIn PDF document text
    • http://temppicture.xyz/ravizekisebagujidazae2qwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368500/normal_5ffd5d21cb5c0.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/sepovutapakogaf/53195563021.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/fajelulazigu.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/publisher_handout_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/how_to_update_a_garmin_nuvi_1490.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/google_grocery_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/fumakebudamowor.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/famutuvupuwigodi.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/kawazidubili.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/mama_bear_legal_forms_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/minority_report_brief_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/material_design_android_app_template.pdfIn PDF document text
    • http://xisaripuli.rf.gd/kobalt_8-gallon_portable_electric_horizontal_air_compressor.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_off00012a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A23 5652 bytes
SHA-256: 1ec9fe911509d16dbcca17e538a0038dd90812ae355d830d719e12c438aa67b9
font_01_sfnt_off00013d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D61 10692 bytes
SHA-256: 55387b492faf9b88bcfa903482d8fd487c7e22d00d1ba701fc49f33595f8ebc0

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