Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a076785a7ee9ce7…

MALICIOUS

PDF

91.2 KB Created: 2021-06-25 20:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c51023b016f3a72e8b936b0ff635d2ab SHA-1: dcf56753ca95afbefe918fb02c31122ae4a7149c SHA-256: 8a076785a7ee9ce738b5a42ed96510f1cc7837be354bf959d2a0e70a65c1da75
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains embedded JavaScript and a link farm pointing to compromised CMS uploads, suggesting it's designed to exploit vulnerabilities or deliver further malicious content. The presence of a callback lure indicates a phishing or scam attempt, likely to trick users into revealing sensitive information or granting remote access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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) or Microsoft license-boilerplate 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 https://philabc.ru/uplcv?utm_term=homeless+shelters+near+me+for+adults PDF link annotation
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607029fb37a35---51360620862.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/97496670999.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081800735726---32326279742.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a0ecaf089---61150762561.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/tafavagakizelugemivafi.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/bemokebol.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/todub.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/24193730357.pdfIn PDF document text
    • https://motacademy.it/file/mawitifiv.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/18003573895.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8914ea13---92496937465.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0492451f96d5474bce12a3157ff95bd6/28024419860.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/56e53f7c2fd4e81cd1fb94a7808ee003/jumap.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/bd82f54fa56d55c52baba67a43eac6ea/tarigodetazejigidaselaki.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/50776764646.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28fd0ac5f3---tevup.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/06a23ab94ddd471a594a4cd35ee7a93e/runidepufawofurijanabewir.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f696e52d55---zivanupozativusowesez.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a651857d24c---wakeriweladufuzas.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/sipewujepirepulefapus.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2720608f4---88592268181.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/284b9aefffa6d76aa5d93e547059d06a/bivabagemuwuniledatadewex.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a8d2833d---xolesir.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073c09bc2aef---56491851873.pdfIn PDF document text
    • http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/zekisumaxogasaxaxam.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/lovunan.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_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 10620 bytes
SHA-256: e6f700970e616473bd0f70be39aa9c8882556fc5ac3aa308267fe3f808d3bfd3
font_01_sfnt_off00011a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 17204 bytes
SHA-256: 75fd2bf1b229d49fab6ebc4b7ca6c1c41b9542f8f4628f9c04cc072816170948
font_02_sfnt_off00014726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14726 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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