Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e692b9c6c36eb0a…

MALICIOUS

PDF

74.6 KB Created: 2021-09-05 11:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 28d6e781f701047aed21e438c483723f SHA-1: a317428440a0812742559ccf0b3eeda5395fed4b SHA-256: 7e692b9c6c36eb0acede90905c490be0e314cc48ed82d42429a050814d150422
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised CMS upload directories, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/ad39961ca9829aca42c010d39470d06f/24479954748.pdf In PDF document text
    • https://insolite.lu/img/userfiles/files/11651365723.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/sizerinogovijubenum.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/2c5c902847181eb654fa151554b571fd/21053012199.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/21046197920.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4f297154be76c75c5b4883cafc4d66a9/81128728790.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/o6bh6pno7ri6ee7i4uuk87rt11/noxesigodar.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/wedabopomosuguxijig.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607449ccc2abe---bulelaxod.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/xikuna.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/kosoz.pdfIn PDF document text
    • http://ulsantour.com/FileData/ckfinder/files/20210810_8CC3E83471201E31.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/18fbdm4a350l8ud4fknhpuohd0/79194177591.pdfIn PDF document text
    • http://tv-kitchen.ru/files/files/23999279770.pdfIn PDF document text
    • https://nasikampung.info/contents//files/56932152652.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/6061863519.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210719_A125A93695BAC429.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/80248099754.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/pilawefosokewisulatomuk.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb024375ce8---66824996226.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/xaluzo.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/81228238441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=resize+pdf+max+300kbPDF 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_off0000c170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC170 16356 bytes
SHA-256: 00bb2524721aec6f04d1e3b2f5630a402f6b2f18728a48d1fc2fc61a835e6d22
font_01_sfnt_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 10924 bytes
SHA-256: 58ba2dda27faf7feca32c1b4a12b7f506c3f3c510a5e14e7d730fb72e4b6aada
font_02_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.