Malicious PDF — malware analysis report

Static analysis result for SHA-256 7262858569340e01…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 13:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3dc4f21d5bfd0ee8ed1965bc7e138bf5 SHA-1: 3507a284ecb94c2c8990f0eb96e2faaadfcad435 SHA-256: 7262858569340e01d26e9527aba43c62e647c626bf094d0ac5ba01511841241f
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and a link farm pointing to compromised WordPress upload storage suggests an attempt to deliver a malicious payload. The document's structure and the nature of the URLs indicate a phishing or scam attempt, likely to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • 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://www.jindatunnel.com/up_files/file/18633223878.pdf In PDF document text
    • http://supermarketdv.ru/files/file/89948857437.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/52527442919.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428bfe14e95---64253302202.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/rufavomorirukeduwezij.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613610aa5f268---81238633644.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/49466536468.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134108ea2aba---38616776131.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0a6c922754129019b92e3d817f634fb5/90102678825.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/94b5qlj369otd3p8p0mb0op50m/buwewapu.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/36150271565.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/15007233114.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5479f3131bdd4310a5486c4cd6f54f4e/85576725430.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/94570449643.pdfIn PDF document text
    • http://konberdbio.com/upload/files/jerotadifipuvuxab.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/95267267967.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/14932395934.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/10229112621.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613daba2c5b40---9106411276.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/bisafizupe.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/68795613517.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/88471ddfdda88da15dc5d5b95a55fe0c/xuzarizekewimobufakumi.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/jutunazuwuzesarorinig.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/m3pqq5in2ll1borafi9k2ma5v7/24714749570.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/8045456292.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mp3+downloader+free+downloadPDF 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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10384 bytes
SHA-256: b20b2c9048d6c36ea8dcf873545ca11b061ed1fd18b26a596fd48529e227ccb7
font_02_sfnt_off000112f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F7 17928 bytes
SHA-256: da08764b5f19472b6b901184e31ae7e0fc14eb37d5ca307a6f9dd4706ac23923

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