Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b74524867d2cf7…

MALICIOUS

PDF

83.2 KB Created: 2021-09-09 03:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 61fa155482a832649aea13bd0e83f2a3 SHA-1: d7bc961723f8e7097621e12b62b3a3fef5365586 SHA-256: 72b74524867d2cf7d0be43212e8019c14bc258f928570de0b96bf45313859bda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that impersonates a download for Windows 7 Ultimate, suggesting a phishing or malware distribution lure. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing attempt to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://rotarycochinharbour.org/ci/userfiles/files/34005317317.pdf In PDF document text
    • http://dobrejaja.com/Upload/file/sugovupusiturugo.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/33724218057.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/84542059400.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/rafarasa.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/walawuderimuwanovutas.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/16302070935.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161342d553a081---zanatakajawevuxivuwupas.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/loluxekolox.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/muxizasuge.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/duvutusekedem.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d66bdd018---xomiruzevibazimido.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/kumovajuripavabovutepe.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sojumoledo.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/99998831263.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/xiberef.pdfIn PDF document text
    • http://yuanda-boiler.com/d/files/59568923153.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/dad44ac0489574653b3c27e7d9bb3fd4/piwuluwogedolusexonom.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/fpvlktff9m9n2ndbqnjvecvlfg/samivajenereko.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/bizaxuvozukurarujover.pdfIn PDF document text
    • http://fpole.ru/sadm_files/pidumoke.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/69212843927.pdfIn PDF document text
    • http://guitarenko.fr/img/files/15333528441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=download+windows+7+ultimate+64+bit+iso+full+crackPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 17464 bytes
SHA-256: 479eef48ac810aca106f35a32fab9d990f821599d49e29b5f3903bc06b0124f6
font_01_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 11352 bytes
SHA-256: f8215f3043f6d2d8cd1105b64953e27b67578fd581eaf71b978b2aa365861607
font_02_sfnt_off000126db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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