Malicious PDF — malware analysis report

Static analysis result for SHA-256 1006fcd9e7e2c53a…

MALICIOUS

PDF

85.6 KB Created: 2021-09-08 06:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 236a8befcb473e54775be02307779f71 SHA-1: 8aae713d94a97a4b81233d38346c81bea768a9d7 SHA-256: 1006fcd9e7e2c53a4630ebbad78568b606a1b1e8147349d952a30173c6942b0e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress upload directories and disposable hosting. These links likely serve as a lure to download further malicious content, such as phishing pages or malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • 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 https://perfecthospital.org/FCKeditor/file/gizadazerowepaxo.pdf In PDF document text
    • http://archi1919.com/smlclub-files/file/54639731675.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/45449328763.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078b075c856f---gigerod.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611e6433061cb---53880388711.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/c534febd39440647b9b044942f50128b/marilodesosopomakib.pdfIn PDF document text
    • http://rrsphotography.in/outscapes/admin/ckeditor/uploads/ck/files/jopuzi.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/80433862750.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/bujizob.pdfIn PDF document text
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/45484634323.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2a19600d---fatukizogo.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/cchh2aljn48crosqc5pguk4ru4/kaxerufiwad.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78e996e824---pezoro.pdfIn PDF document text
    • http://creationart.hu/files/file/68119394505.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/jajenujozimogeki.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/pekunemelepanofewetob.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/85b7989265c5f20ad12c37430659dbf8/mukaredeburagawukefitim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7c2a69755---melawewudemagivaxes.pdfIn PDF document text
    • http://mgrima.com/files/file/vijasanotazikuromiraxa.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/91906176399.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/65419770631.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/85446679742.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160921d6ec1111---pafinaworenavagobisar.pdfIn PDF document text
    • http://mfcpavpos.ru/file/11264581186.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/40695230736.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072556147834---39780519126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=vauxhall+astra+sri+nav+2016+manualPDF 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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 10820 bytes
SHA-256: 1e86b85bae5773450aba0e43760cd20d2efa8dd57a2cc2f9397a58488291b317
font_01_sfnt_off00010399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10399 17536 bytes
SHA-256: f3a807ff2cfa6ee6f1cbdf4a155715f0c85ea3c3e87acc602c6e835016406261
font_02_sfnt_off00013065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1