Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f96c3c150a1311…

MALICIOUS

PDF

84.4 KB Created: 2021-03-11 12:34:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e5e99a9fdf512683ff9ed37c7cfa5b48 SHA-1: 53a62d9740dd370145724c450c5237c725fa5a34 SHA-256: 67f96c3c150a1311522adcf47744f12c022e023cee672dffa8089341f1c9c414
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 0.9998

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://maypoin.ru/award?keyword=binary+tree+traversal+in+data+structure+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5fc7a13d5814e.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/excel_vba_code_cheat_sheetkxazf.pdfIn PDF document text
    • https://cdn.sqhk.co/sulojumi/fjegjqa/sparkling_mineral_water_vs_regular_water.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_602e845456b37.pdfIn PDF document text
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/2126858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_600cdebbf40e4.pdfIn PDF document text
    • http://milanomodaitaly.site/technical_analysis_and_stock_market_profitsdh6u6.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/fiijggh/78095022431.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/rheWhhd/59063136161.pdfIn PDF document text
    • http://ipatovaalena.ru/855203102214976i.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/iehfdPQ/wazuruze.pdfIn PDF document text
    • http://xinuvaro.sportsontheweb.net/73896555059.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/zopisiroged.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/484e32ae4a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_600dc03211302.pdfIn PDF document text
    • http://24goodstore.site/black_and_decker_thermoelectric_refrigerator_not_cooling49geh.pdfIn PDF document text
    • http://operationhomeplate.com/verb_forms_list_with_gujarati_meaning_free_downloadp0yzr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_e73121c7a9ea44749be405002886f6ae.pdf?index=trueIn PDF document text
    • http://moxosutemow.onlinewebshop.net/agendas_escolares_para_imprimir_gratis.pdfIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_0640940ed03047e9b6da5d033e86b80f.pdf?index=trueIn 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_off00010bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD0 5360 bytes
SHA-256: fdc600d538c12f273d756f95c3d93d670612990099d06de5530b0e501627b60e
font_01_sfnt_off00011e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E29 11128 bytes
SHA-256: f5d7a0a9b0e58c5dfa93d18a1df2c0c1518cfa6c2c110f5adffbf7fe9dddd62f

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