Malicious PDF — malware analysis report

Static analysis result for SHA-256 440202fdf6acc795…

MALICIOUS

PDF

70.1 KB Created: 2021-09-29 01:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5700d76d70fa5f3d32186b98c15d00fd SHA-1: 874d29f2e382504aa168038939c36f654f0f9206 SHA-256: 440202fdf6acc795ad9628b422683a65a1b681cabfa5a9435246f3a7a7dbbc54
96 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads and disposable hosting. The ML classifier strongly indicates maliciousness, and the structure suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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://motodubai.com/uploaded_images/files/kidox.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/b6a1089b899bfbb0bf5446f1dab746db/36623252128.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/borojonibuvomuxaw.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/wafagojesanese.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/fasebarezetavawobovasub.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0926/b1caa4be32c656a59c20b36cd55c4602.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bubafefasib.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/4vs8tc4bn2ssk1m3hrne7sg5cs/81606955352.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/jizedatedimev.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/79172939431.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23177085975.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/daxikufori.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/menel.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/db3e475e6a236f52f3a5ed679f59930c/xozabigika.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/76928714071.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/xabedir.pdfIn PDF document text
    • http://prakseologia.eu/userfiles/file/93174930605.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/26980152221.pdfIn PDF document text
    • https://lp-tracking.com/userfiles/file/valumaja.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/wofelogenamuru.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210917235257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=ipad+message+to+androidPDF 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_off0000ae6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6A 10640 bytes
SHA-256: 212cfd4c8c96c9c0fa275d0f0a5243a1f6eb2445ac731f2c4aa8e4041dc97bb4
font_01_sfnt_off0000c681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE93 17448 bytes
SHA-256: c07dc2aaebefc4615e07abe4a1dc68bae99f83c964693ed0862ec7ef3a473cdf