Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee70aafb929521ba…

MALICIOUS

PDF

78.6 KB Created: 2021-03-08 07:08:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ae5b9fb2645ec72a97fae7d361adf120 SHA-1: 7acc49305f6ed554c00c2549bd1e56944fd6a64b SHA-256: ee70aafb929521ba8d16f0044952de38fffa0a44fc4ae0027cfc453c310c58ba
126 Risk Score

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 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-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://pelibifir.ru/strik?utm_term=lewis+dot+diagram+chem+worksheet+5-7+answers+key PDF link annotation
    • https://cdn.sqhk.co/simikitivo/jghzaGa/kusubikamozowo.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/wisonepubozejiv.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/HPhbd7u/depevubegured.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/3668138133.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/Qwhehjx/sea_monster_city_mod_apk_home.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/aREBvhh/legend_of_ace_best_hero_2019.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/why_does_dyson_vacuum_lost_suction.pdfIn PDF document text
    • http://votatiji.22web.org/3rd_conditional_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/wemulekojex/cgj9Sha/house_flipper_home_design_renovation_games_release_date.pdfIn PDF document text
    • http://napufokotipo.getenjoyment.net/giriridepegirumabuduj.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gfhg3Gk/how_to_make_a_mask_lanyard.pdfIn PDF document text
    • http://dikiradojasika.iblogger.org/suvewasojewude.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/likerajatob/33348075015.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/critical_ops_latest_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/82196141963.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/joguxabi.pdfIn PDF document text
    • http://davinawoguzag.atwebpages.com/maytag_centennial_dryer_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/voucher_template_docx.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_off0000e659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE659 5544 bytes
SHA-256: bbea649f88f29dabc144250be23997516294b9be18ef6f374610c67f81e97a19
font_01_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 10904 bytes
SHA-256: c9c68cd50e43fb877cc5b43e5e3703ec406320ff6cc29e5f4fb9fcbf18105c85
font_02_sfnt_off00011e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E64 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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