Malicious PDF — malware analysis report

Static analysis result for SHA-256 5246fd224241a262…

MALICIOUS

PDF

80.1 KB Created: 2021-08-27 16:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f61de2aefa7fc66b1ce2e4457c83fcea SHA-1: 416f5657146d751f9b6d5a9febdf11c90ba4a13b SHA-256: 5246fd224241a262235a2cfcac31d534173a5d4ecb8422f2fced1d40b4234089
164 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 a machine learning classifier. It contains numerous links to compromised websites, suggesting it is part of a phishing or malware distribution campaign. The presence of a 'download button' heuristic further supports the intent to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aliglobshop.com/userfiles/file/totanizeturu.pdf In PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/622e51355b9ed2ba883abed4124ac695/wanugurudimuf.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/budezaw.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16114e2c19d591---9408945148.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ld32i5g20k2rrvkkiafr19r084/15530936260.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608127c17197b---44096334982.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/34805b452dd13ab48526f6ebe18f936b/96200673880.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/35932582864.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f0af27f19a7---86086296543.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/rujemogerunaxavuv.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160708dfb1c6bb---karuvadeki.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/e7ff34d13ed153f0a27e2779b21d39ca/44642469697.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/41689477594.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bd5004c6bc2e51fa7ae5d07186474b45/zaxabameruxe.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/77401520606.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/c768108ae5c60c1cb511a4fad0861acb/wujadufekozawemena.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/80425201569.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/9939031263.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/48229902742.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/2245590558.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210628061546_MTQ3Mzk0NzUwOA==.pdfIn PDF document text
    • https://x-software.cz/data/file/sakiniguromago.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/21309151416.pdfIn PDF document text
    • http://csc0898.com/userfiles/file/20210611090943_i7ug5t.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/iji1pms9ijblmom8d6814l54bd/15933032865.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+matchmaker%27s+playbook+download+moviePDF 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_off0000d526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD526 11272 bytes
SHA-256: 4f54ba1a7d75f27eab95a644bb71d6467123066d549652ab0fb244be597dbb96
font_01_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 16384 bytes
SHA-256: 69f5a92a3de2d92457b88214b62bf9462132b4e44f4b49df4d67e50a92ecac4c