Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9130bfa35ce157…

MALICIOUS

PDF

213.1 KB Created: 2021-07-03 07:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab0d255a78f5c6a6404cf71e1e960a0d SHA-1: 037bdc662746be6eeb1d39294a002372e64907cd SHA-256: ad9130bfa35ce1576340a20d187a099e6d060827863d41a6c82b50436baa858b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution attempt. The presence of embedded JavaScript and numerous links pointing to compromised CMS upload farms suggests an effort to redirect users to malicious content. The primary attack pattern involves leveraging these compromised sites to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

Heuristics 6

  • 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.
  • 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://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5a60739f4---57652417684.pdf In PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/hq5hviuhi1vc363pmmp4t7g9k5/gitiwesutulugejig.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160adea6b28dcb---farenuwod.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-2/20210502090454132497.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3f461597870214de237783aaceb38d37/9893877681.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b997847cb13---71749429330.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/85671761080.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/23793942716.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/27194387243.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/782bb6a452757b12ef12d0114f54a356/46201639675.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160d59bd6e0a5c---wexewededexasararo.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/63e11bd69f6a65a012cc6b78da72f76e/92945643404.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097b97671d05---ginagerasemitig.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/14792106103.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/03b46232d258052f08338743d9e62579/fojirelikezobug.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160957c7a0a201---kolesi.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/9f860db6f9a3ee3d65feaa8c6e35502c/sixesuzeparuze.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e892c8cae---44428723368.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3821ddeac---rufakexavojolaliroga.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/jeluderemuzunidumofule.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb3936bd7d2---matinafe.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28d7e05aab---41003832809.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/lujokevigebivege.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/53499955858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=jellyfish+what+they+eatPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002db41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB41 3112 bytes
SHA-256: 7d60ae06dd1d6ac48da91065aceece5dd449997bbfef03fa59e9eae77d4bd90f
font_01_sfnt_off0002e7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7A6 18448 bytes
SHA-256: 5ed7843e391909cd6d30e3ef35ea053faf695d1c2de45df7cf1120c8e8a87c95
font_02_sfnt_off000316d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D1 10176 bytes
SHA-256: 3974952f30a7bd170070d1abf43e856f1deac378ebbf14d0b4ab3a8af0515d60
font_03_sfnt_off00032dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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