Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05de1550a938e92…

MALICIOUS

PDF

89.2 KB Created: 2021-07-07 03:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d7d563853c4b5e10182da7f6dd32da20 SHA-1: 0279a04842b6eddccee36ba52186aa5cfd060fa9 SHA-256: b05de1550a938e920a8ac25f89fb67625505e55d947db0f6665d34c95cb8b5ee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam pretext. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • 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.
  • 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 https://infrive.ru/uplcv?utm_term=age+of+sexual+consent+in+nc
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/5f6d249666ee310076a737e608afefa1/14708652471.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4514f3ca0---vivisivitamer.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/8fad6a9b0fa1dd0bc407e97ee6704691/togifusosenug.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/xowuroboxe.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e519ea49---kuvolowo.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/2b4024dfa1fb44e8e9a5d3e86f355d66/49227564845.pdf
    • http://sushi-belovo.ru/files/77892677062.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/68218ddcb4d486e101983f7644e2199f/tedigimipozelobagixo.pdf
    • http://cpspcb.com/uploads/files/xegibojatubidonagalelizu.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46ab5f3ef3---55467318870.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/d65f4080e93568f4990e255db6c7ab62/41341920798.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a527592fdeb8421ac4c7e99e7e522b74/99129040396.pdf
    • http://agiusfuneraldirectors.com/files/file/xilozijimum.pdf
    • http://solarhomepage.ch/fckeditor/editor/images/file/loroxilitimelu.pdf
    • https://autotronics.vn/userfiles/file/37593811195.pdf
    • http://seyrimerdin.com/userfiles/file/jonive.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/da283dd52f5955f9e4a7fa3a57c11e4b/fejinokitovuro.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5ac4c5d79---xatosak.pdf
    • https://liur-krd.ru/userfiles/file/67040278491.pdf
    • http://www.hangmandigital.com/files/file/monojafenerovote.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/1ac1b130e087dd5117da5d7350d8e443/57021019159.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7895f935b4---49573028998.pdf
    • http://guchenes.com/d/files/fusuzuli.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/03a241fb663fdb7f048fb9fe81f5989b/kujipowojowa.pdf
    • https://autotronics.vn/userfiles/file/19707660624.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/c09ac1d0a393aed901db5ffb020431a0/80889283025.pdf
    • http://gsmontaggi.it/userfiles/files/64390898180.pdf
    • 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_off0000f9c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C2 16792 bytes
font_01_sfnt_off000111d9.bin
6a5cde42d8d4ae5c8b4baed2c0ed779773c3cdaa1963fe4c108ef30747f1952b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D9 10596 bytes
font_02_sfnt_off00012a3f.bin
479364efb04ff172b209369c5c37a593f8747d0845aa29850f279c7f6cb51d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3F 17172 bytes

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