Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e601bba14823ae…

MALICIOUS

PDF

76.0 KB Created: 2021-04-02 21:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8770d1f3620f7b9a8bfb84e482f1fd1a SHA-1: 550988ca74ab71415172f716cfb90c90c6f048e6 SHA-256: d4e601bba14823ae9f07d58fde11b95d5fd60417402d83f461c1dd98b7489e7a
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. 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
  • 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.
  • 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
  • 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/award?keyword=bstc+answer+key+2020+download+pdf+free+download In PDF document text
    • http://falorilipeb.mywebcommunity.org/european_stock_market_futures_now.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/cooks_essential_pressure_cooker_recipes.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/48947462070.pdfIn PDF document text
    • http://radanukodufam.22web.org/android_studio_define_apk_name.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/british_museum_floor_plan.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/english_amharic_medical_dictionary.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/basic_accounting_concepts_in_marathi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_602b602aca716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_605f3be1797c7.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/mipeboro/biostatistical_analysis_4th_edition.pdfIn PDF document text
    • http://puzexexaniledow.epizy.com/2593273012.pdfIn PDF document text
    • http://fuvuxejuv.myartsonline.com/cv_for_master_degree_application.pdfIn PDF document text
    • http://sobisatoto.epizy.com/47663359260.pdfIn PDF document text
    • http://kebowikosu.epizy.com/xogobor.pdfIn PDF document text
    • http://vofaxov.epizy.com/what_is_a_fluoroscopy_guided_injection.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/cad_viewer-_dwg_fastview_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/bodubabilazedel.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/insinkerator_hot_and_cold_water_dispenser_faucet_only.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/28129770507.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/bushcraft_knife_template.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_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 5728 bytes
SHA-256: 027ba47260f6ebdac39e9e99ecf6c601ca765ba1ca4bebe46c88db0eefc16be2
font_01_sfnt_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 10676 bytes
SHA-256: 572cbcb5f400d47e32e7dcbe5d085617cff1336aa6daefb0c47810d853e85530

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