Malicious PDF — malware analysis report

Static analysis result for SHA-256 a358671ab3523975…

MALICIOUS

PDF

82.1 KB Created: 2021-03-14 03:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 70f6952e5b8eef8faea113863b6404d9 SHA-1: 9c5e23a14428325077fb3ac68d5da6d69ddf3a8a SHA-256: a358671ab352397561cb300bac67f7b8dcdf8791fa4f4a3766328ec744680ac8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of many external URIs and the overall detection profile strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • 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://fokemale.ru/award?keyword=ficha+numeros+romanos+4+primaria+pdf PDF link annotation
    • https://cdn.sqhk.co/vumuwilaj/ghvehWs/rinugugifewalezozudidu.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/fH4jchj/99353972652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_603fdd61c9d4f.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/zhfjz8r/descargar_move_to_sd_card_pro_apk_gratis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492536/normal_5fdfb56cc6742.pdfIn PDF document text
    • http://italysummer.fun/whitfield_advantage_ii_pellet_stove_troubleshootingw6g40.pdfIn PDF document text
    • http://znohist.site/variance_of_binomial_distributionlyde3.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/v6jjhZp/noaa_graphical_weather_forecast_seattle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466364/normal_5fe0a7eb0d148.pdfIn PDF document text
    • http://smartroom.pro/rusutupoxetaxozipilak6pzv4.pdfIn PDF document text
    • http://extraevents.ru/burger_king_breakfast_menu_prices_2_for_4nh077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_600fc55a1e898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_602be35f8cbf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_72379a039172465a8b0815dabb909e6a.pdf?index=trueIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_6dc3f482171c4a809b0eb4c204b581ec.pdf?index=trueIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_57a76d6a0f014dc5a35574def232ffc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b31a6a-33dc-454c-b7d8-81bc6ec33592/who_is_the_clockwork_princess.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1920d7a-504c-497f-920a-1cd3f30a13e7/ssic_navy_codes.pdfIn PDF document text
    • http://keporumutiwem.epizy.com/pdf_file_format_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fdc8c2-1d9d-426c-b08c-d6b7b62655cd/what_is_a_law_school_personal_statement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7707b3-2bee-47b8-8f7f-b35b69326789/the_odyssey_robert_fitzgerald_translation.pdfIn PDF document text
    • http://gidozowelixije.rf.gd/beastly_alex_flinn.pdfIn PDF document text
    • http://goxakimolo.epizy.com/best_logo_maker_app_for_android_2018.pdfIn PDF document text
    • http://palowok.epizy.com/difference_between_data_mart_and_data_warehouse_ppt.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 5408 bytes
SHA-256: 4d3a6b1a8a8cd0159134626564dc8715ecc2d667562036ea46e1afc3195ef5c0
font_01_sfnt_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 12300 bytes
SHA-256: 98997216a623c1c03e7bde01c22c6c060e7a8faba1c99f189bf0015d5b059209
font_02_sfnt_off00012376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12376 16164 bytes
SHA-256: 0b9a470a83749802badcbd7d1d0fbcf06e3a9522711bbcc605b37bb17f1ff554

Open this report in the interactive analyzer, or submit your own file for analysis.