Malicious PDF — malware analysis report

Static analysis result for SHA-256 05589b08e8c655c4…

MALICIOUS

PDF

75.8 KB Created: 2021-09-11 04:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 300f6701f597b54684f471ed6f3d6e85 SHA-1: ac845632c4ccb93b21197957560158d27299629b SHA-256: 05589b08e8c655c4ee51582daa3c399261759aab843274e03230ac8670d2badc
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 0.9973

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://pistant.ru/uplcv?utm_term=inspirational+sunday+memes PDF link annotation
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/85b88aa71be251173c2011aed9cd3a2a/7438332598.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/kuzivixiguxaminefuwud.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/tixesutumozaxejepikonaz.pdfIn PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/fazutokax.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/12437611066.pdfIn PDF document text
    • http://gibisch.info/files/files/73954397888.pdfIn PDF document text
    • http://www.tamtrebinhminh.com/public/files/64245412050.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/merovoputikopalefareba.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/xagetig.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f954568c86---56592892398.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jeleminozemojomuze.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dotuvu.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/xadotokulubilitedokodiduf.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/lisupozirikexavaferara.pdfIn PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/2255431750.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/88506313582.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/mezikozid.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/76474727765.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/50322023625.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/91996040215.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/59964677040.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/28412719624.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/67330248525.pdfIn PDF document text
    • http://bubb.cn/up_file/file/mowaverufe.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c52c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52C 16904 bytes
SHA-256: 0200c810281d0c9402ba09e4b093ec153bf606961a30645b298d8fb5c779e466
font_01_sfnt_off0000f09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09B 10716 bytes
SHA-256: b2a2b6470dcc66452090089cd5bda89873c1e977fe523dd095d312b9c6fa7aca
font_02_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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