Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d2ad163837e6b2…

MALICIOUS

PDF

80.8 KB Created: 2021-07-03 20:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 75b7e97fd91d3b79db9c16693f026934 SHA-1: 135794a9a49db483a59686ec300f72525d422cf2 SHA-256: 93d2ad163837e6b2b7a757b12773aee5d7351bc2430bc0ae03ab2b21a49ce201
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of multiple PDF files hosted on these sites further supports this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/5788b0196cfcc5b1e1be76af23b70573/dikejivijunojudut.pdf In PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3cf7d8486---zujamajo.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/xegibivimuja.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a0194dc5b52---18030327403.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d051920d3ea---kunab.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/83532872003.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/70494779857.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/96862504733.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d52513e150b---xuduw.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ef7d0ca6000b332cfb26033cb5e57ebf/8735431310.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/ferimotomilutojudabilutel.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210529203351.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0c391490---pejixasofinujebuwevilog.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bca741c82---28729735480.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/24252343162.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0263dac8---64413660106.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210612215443830129bd1712.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/bgjj923u0183mf96k58df7sus8/nagupot.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/31389872894.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/5aa44fb5b51fb8bb2ca03f4ae19620de/15442573737.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160d01a3ed6ccc---werubuxifavudadovox.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/33783081753.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e335fc0fb6---83802832960.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2c4c41c32e6914fb5e492e0893719008/kaparowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+cake+ole+keighleyPDF 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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 10208 bytes
SHA-256: 619ba9dfdecb29c08127fa0e7ed56ceabf1cbc1c0d1457b42e7ed1ebcd08becd
font_01_sfnt_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 16612 bytes
SHA-256: d702394cb04a97fbede75b123924e3fab21bc7db6bff2126f1629bea4c5d103e
font_02_sfnt_off00011e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1