Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae0207e0a1c595d…

MALICIOUS

PDF

84.8 KB Created: 2021-06-25 14:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e93d2c4ac17f4442b1dae76248c685dc SHA-1: d2ecc46ad998dd3e159eec8e4e7bdeeea6d90fe7 SHA-256: 6ae0207e0a1c595dc3cee7cc716320c68e9bcca870a620556cef1f5b4ff6567e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a distribution point for further malicious content. The presence of a 'download button' heuristic further suggests a user-driven download workflow. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16096c3e8a9084---68441357711.pdf
    • http://tomaszskiba.com/userfiles/file/dokipogisoviroz.pdf
    • http://webinaris.org/ckfinder/userfiles/publics/files/visufapusepinif.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce261b400b---66676237049.pdf
    • https://nepalimodelagency.com/userfiles/file/76727597400.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d507bf9a2b7---rutasawelerisubowo.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/po5ncctd2c00f455mofpcpccbq/zator.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/15f47887d447bcd629bd3510dcd92f59/90128546697.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/273ac946593daf75f4a4eb35d1accc8e/jefitutetitepajem.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/30976d744c98ff3423efe439021b3112/34857551283.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765f6dcc3ab---vetiredisenigafujaj.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f7cad47d17acb9f4d6745a96a2b9859e/6585252112.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160843a4544b66---59618966070.pdf
    • https://bawaniint.com/ckfinder/userfiles/files/gibexegonuk.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4d1db1659135e764d7ea97b74e47a178/4259030238.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/27e0779f7ddeaca74cc4c14263672db8/vugiwugekonidivusali.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa13ff2817---dobobobupevabaguxelimuw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mobdro+install+on+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac8.bin
93d22673a12b4c72d0d5bf17798bfc8180b599c7131194b372f68bcb9ee10e23
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 17200 bytes
font_01_sfnt_off000117b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 16792 bytes
font_02_sfnt_off00012fc7.bin
e8244b9e9ed015c3332a215fc3e31585447d93c713ac5cc8e9cb9b193c73db47
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC7 10240 bytes