Malicious PDF — malware analysis report

Static analysis result for SHA-256 9649bb8eef6f5805…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 15:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c27f3dfd7b63c7f9ee1ae48737a2b30 SHA-1: 1b5bd84fc2fd3a80ccfc931f0f35538f08a5b8f0 SHA-256: 9649bb8eef6f58053bb80312705116d18acc9d8136e104b19347d08eea91f30e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://mezovuduw.ru/strik?utm_term=how+to+read+mbbs PDF link annotation
    • http://gisomog.iblogger.org/65151201885.pdfIn PDF document text
    • https://jumomemokipus.weebly.com/uploads/1/3/0/8/130874307/sapezaribaviv_fuwatupozupa.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/8c5fbbb9765f.pdfIn PDF document text
    • http://fobexugelego.getenjoyment.net/89796075773.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/zobuwubedak/2406813086.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/wijudijowirenopologadob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30f5a20-3c60-4acd-b1fc-1546cfa6376a/32059890096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d31964-a5fa-4ceb-9119-76247e31a44d/plan_y_programas_de_estudio_2011_secundaria_tecnologia_informatica.pdfIn PDF document text
    • http://fexewagesulel.epizy.com/57882345165.pdfIn PDF document text
    • http://jibubifo.rf.gd/lesatimatifamozazonol.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/a._b._s._a._ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/rizarironuvemaguxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42ae77a-8478-426b-9d53-deb2282d7a05/defining_deviancy_down_wiki.pdfIn PDF document text
    • http://xikisefux.epizy.com/cubes_and_cube_roots_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf92b2c0-9c3f-4e2f-98d0-c2a3fa9d3a96/roland_td4_price.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/78396103994.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/cladogram_activity_classifying_fruits_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5bc340-3861-4af7-916e-3b39af440262/positive_behaviour_support_plan_template_ndis.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/netgear_wgr614v9_reset_button.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/87231887368.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_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 5132 bytes
SHA-256: fe530ecaec06c4997f5c7f3c2303a35a441a204edce478d4b4d115c193b59a82
font_01_sfnt_off0001044b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044B 10584 bytes
SHA-256: 601c2777d6027f277eb796f8d0a897816b35ca75a320e5df425bd79e875633c9

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