Malicious PDF — malware analysis report

Static analysis result for SHA-256 552e6d65edefae10…

MALICIOUS

PDF

95.4 KB Created: 2021-03-29 17:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 012e17a78d3c2ff7792024616906b309 SHA-1: 52ee6f7d58765a27c9e226df54af83556b61e8a5 SHA-256: 552e6d65edefae1026c397d09bff925fe2fb3aa8bc9cef449320ce539745949d
126 Risk Score

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 0.9988

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://pelibifir.ru/award?keyword=flirting+messages+for+her+pdf PDF link annotation
    • http://govuled.mywebcommunity.org/51099592741.pdfIn PDF document text
    • http://vajukadezazi.getenjoyment.net/probability_simulations_worksheet_7th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/sanojuxako/hoijVLS/norodifibe.pdfIn PDF document text
    • http://natosabi.mygamesonline.org/la_nueva_dieta_anticancer.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/business_english_books_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5ffbfd073f328.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/f9hhegd/81498407030.pdfIn PDF document text
    • http://mibijuzorifif.getenjoyment.net/an_anthropologist_on_mars_oliver_sacks.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/dewalt_d55146_compressor_regulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_60581b22b6904.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5fe500406e0e1.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/gN6D2gc/fruit_juice_splash_vector.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/QxPgjuC/73757432798.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/Smhdgfz/66475220471.pdfIn PDF document text
    • https://cdn.sqhk.co/guviterolovu/cgdgigj/egg_wars_download_free_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sokavuwoz/eTMhgT5/zemaxodepafekek.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/UgfShdp/minecraft_color_chat_tester.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5fca638e82b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465145/normal_6014f5b8e6618.pdfIn PDF document text
    • http://dajazadek.22web.org/84029774027.pdfIn PDF document text
    • https://cdn.sqhk.co/gosuzufus/lhgzhe9/different_fonts_for_instagram_highlights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimokum.rf.gd/best_video_converter_software_for_android.pdfIn PDF document text
    • http://subejev.rf.gd/gabovazitilapovupevigu.pdfIn PDF document text
    • http://vofoxefubi.epizy.com/saviget.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/72218717380.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9D 3644 bytes
SHA-256: fb97bfafa2793be60574fa298c93bffa2ab06f069b7a4a25d023d92893c3f968
font_01_sfnt_off000137b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B0 5412 bytes
SHA-256: ba99d4c04f958603feb84a825af6d0e469f262cd95be91dc953934c79ff516fc
font_02_sfnt_off000149eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EB 11144 bytes
SHA-256: d9c58d1788fdcfa88144f0533447b6eeda3a74e96dcf093ceb77b36415504d44