Malicious PDF — malware analysis report

Static analysis result for SHA-256 706ec9b533e9d3b7…

MALICIOUS

PDF

95.2 KB Created: 2021-09-05 02:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e106591f73a3e64f466671f0449cd5f6 SHA-1: 6919d736f089daefe7c5fb9fe0518cb6cf097149 SHA-256: 706ec9b533e9d3b70a71ee42507689302583253ad939e53fb1586ecee4cf49f8
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and contains embedded JavaScript, indicating a malicious intent to exploit vulnerabilities or deliver further payloads. The document also features a "download button" lure and numerous links to external sites, some hosted on compromised CMS platforms, suggesting an attempt to trick users into downloading malicious content or visiting phishing sites. The presence of embedded JavaScript and external links points towards an attack pattern involving exploitation and potential second-stage downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://smidgel.ru/uplcv?utm_term=template+for+procedure+manual+document PDF link annotation
    • https://condominiovillage.com/userfiles/file/ziwuvipujixukomufiz.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b261fa508645b441c9db1c66e25178cb/29996056031.pdfIn PDF document text
    • http://montesantangelo.it/files/files/fubobijogi.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/wemobodotamarokipu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/38m6rlc11fg1f57amg6gd0je16/7091082694.pdfIn PDF document text
    • http://consade.com/userfiles/file/64615450104.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/47972202613.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/87973a940e12d8fdfe7ff5155695ddda/68351877618.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c162ae2c29---67719508649.pdfIn PDF document text
    • http://schokobrunnen.com/idata/52729093858.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/1a6902e54d1412ed34b58c59e79f9aa7/83273624154.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/55cd8510aed35014401c8a9705266a46/zukimofedaze.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609f23fb88cac---975299485.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f175a50ff2---jitenazapapawiwupila.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/74601615089.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27578910115.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/fowedarilezujodupejemeto.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/mawuzuri.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/8688686187.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/7t9fp7jp9t83tk202ucbafo3ve/vunakirokanirel.pdfIn PDF document text
    • http://chpcentre.com/files/file/pibibakovewixipevodonu.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210721152534.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/33ae7a5730206d4d358290c80991bc30/47989947854.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/lanifavavaretapizazawed.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12241 20260 bytes
SHA-256: 70f2aef649abf5ed57fc54ea8e4bbc6df73df38fc2c919cd78bcc1e074c2b6c1
font_02_sfnt_off00015745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15745 10584 bytes
SHA-256: 8aaba127e9c79113fbc848b71b437f74fa95dc58300258923097a2feb34d2b28

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