Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e7cb963f46dfce…

MALICIOUS

PDF

84.4 KB Created: 2021-03-03 03:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9d28da9a1f5beb18724e4a39a06388e4 SHA-1: 519e851967f34d3a6f09a9870989dec6c66e1430 SHA-256: 80e7cb963f46dfce01e4cad8a8691be03fa09c5d20c425ea1784eada702e2271
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 0.9996

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://vilenefex.ru/strik?utm_term=famous+five+percenters PDF link annotation
    • http://nutetuxiv.mygamesonline.org/xigonasixinatawuwoduda.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/lRhj4hg/aesthetic_anime_wallpapers_haikyuu.pdfIn PDF document text
    • http://vujumitadasedi.22web.org/calcium_oxalate_kidney_stones.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/nopaletefaguvamobopa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449395/normal_602e2f873b6f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528876/normal_5fcef7ff5abe3.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/migalaguxolite.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/angielski_c1_sownictwo.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
    • http://mevonaku.rf.gd/dutch_zip_code_format.pdfIn PDF document text
    • http://kopolug.myartsonline.com/61716075232.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/how_to_watch_game_show_network_for_free.pdfIn PDF document text
    • http://mebapuperepomuv.rf.gd/jio_video_call_app_install.pdfIn PDF document text
    • http://gakamaxoluzes.atwebpages.com/84170272254.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/52668979703.pdfIn PDF document text
    • http://molutuganum.epizy.com/5th_grade_math_worksheets_rounding_decimals.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/62579224300.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/beta_profile_for_ios_13.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB6 5024 bytes
SHA-256: 22edb2e6481c9253247fe59dff64bc25bc9df8103d02c357540a147767aa250d
font_01_sfnt_off0000fcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC3 10724 bytes
SHA-256: 1e77e801de46a03b18316c9465fed1877b1f3afbfe4470a8d13445c2cc7b648a
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8
font_03_sfnt_off000135ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135FF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333