Malicious PDF — malware analysis report

Static analysis result for SHA-256 782a5bf6f41b63ad…

MALICIOUS

PDF

86.4 KB Created: 2021-06-28 02:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 10177bf3370d4e1de7fd954a3b19460c SHA-1: ae01c4c765412fdb1cb803da93cb4def236e0296 SHA-256: 782a5bf6f41b63adbe750bfaedc925af2a5e1b6369f993ff11cd7cefb4d62a90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised WordPress uploads or disposable domains, under the guise of document retrieval. The embedded URLs and link farm structure suggest an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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 http://mwflower.com/upimagesfile///wifefudojojetoxebavone.pdf In PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2adc0f17a---76851204902.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/76731872598.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/4kpdd1bope9csu7291a653mpv1/95102279836.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160841acc71baf---jegin.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/rofumawaz.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/73270063428.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160817e3f2e359---79630447299.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/98013128631.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/oujpllir456i9jtrf9j3rhb01t/bopab.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8004e485192b913d8b946a6ff57bf89c/97604528167.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf6a4c97a2---9096456780.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/xoxetidaxumenaxekuwis.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/64506090699.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/kajaxozurikuvapupuluv.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/xudupuxobuzetapivanofiri.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/34600673539.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7350e8c6e---gusegaxalejepilel.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/d1567f73d32a572298120574bdcce4c6/68542233050.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/30eaaae46e430f8d96c7ed0cb6537273/74812970893.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acae82d2c5---1487968030.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adca8a95420---gijixe.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/mazixozezopodejigitosudo.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/47716971064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=authorization+letter+to+request+psa+birth+certificatePDF 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_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001055f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055F 11004 bytes
SHA-256: 9ee318192810eebd8db4b00ed51908ffebdad01ef5822476caffb76f4ba728e4
font_02_sfnt_off00011eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 17260 bytes
SHA-256: 952ef599f4cd94498ad3cbf94d2ff3ef95bd24fd795340f4ab70b66d6caf7e31

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