Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a0ec94e1f428e7…

MALICIOUS

PDF

87.4 KB Created: 2021-07-08 12:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d5f68a5d49dc2e5f5ce3950899cb4994 SHA-1: 638e712c885abeaded96a05cf099dbd9fd39a105 SHA-256: 67a0ec94e1f428e71eac421ea354034e3af8797ca1656cc7e41478c276781ec8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The primary attack pattern involves exploiting user trust by presenting a seemingly innocuous document that redirects to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • 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.
  • 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://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/333107859b7ce36f61eaad0e42ada858/58235397966.pdf In PDF document text
    • http://aire-limpio.com/img/editor/file/60482131688.pdfIn PDF document text
    • http://camonetinternational.com/files/file/94015952227.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/41385366660.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/75301314613.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210621_9656FCC14B920946.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afe459263cb---91466977545.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/naberililimuzaluletaza.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160db280a76b14---rizekopadiwopovix.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/vibosizanoxetebivuv.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/80745472835.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/gebavosatukejovu.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47e65bff70---77848983014.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/ab752cb69d388c934f60605d94e45595/52600271271.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/jowawidal.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/e980e9138e10cbb943156d83f0a64ad8/74268448911.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a107148f337---xarero.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/dmpihsa6dk8nbatk9pre7e9k86/52962972267.pdfIn PDF document text
    • http://seamacros.com/upload/file/96877331511.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/25248061005.pdfIn PDF document text
    • https://ivanamihic.com//files/kesedoxabapunad.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df655ce817---fitarufazalivubozafeza.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5170885b11---lupiwoganatojiban.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ff794b947---21023787098.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dd025ec9---mumikugijozez.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/86780383239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+you+see+your+blocked+contactsPDF 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_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 17628 bytes
SHA-256: 82469b48fb31f5f60a978c063ed099d8fcd4785c1142f7606ecd89be328d6bef
font_01_sfnt_off00011d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13542 10796 bytes
SHA-256: 030004c8d495f7e6323278a90a9d03c14b4bbf7c13a8dfa39a41862cba4f580e