Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d2f4f0a49a8263…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 21:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f66c570f39bcd60d67ae3c186f2f692c SHA-1: a60c7752e2fb15ee92320849adde4c369b37eb81 SHA-256: 96d2f4f0a49a8263ebe81d1e24c9dd01d6ec11d815dbc90d5dd864716d0da355
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts for link distribution, suggesting an attempt to obscure the true malicious destination. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for further exploitation or redirection. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://suaups.net/userfiles/file/6886486475.pdf In PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c42163b2ed9cd80b7cf5c06b6f729cd0/xoseposomemiviza.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/83947651152.pdfIn PDF document text
    • http://konikanarrowfab.com/ckfinder/userfiles/files/56755563740.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/88055111148.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/nizagomanumamasadivod.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/vokam.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/sisejoratabom.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/liteved.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///20161453703.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///11094878045.pdfIn PDF document text
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/24472670038.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/70188982040.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bc1e860b6---79616661837.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/dobidenaxuviwurojalawore.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/65201468361.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/58012907766.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613010087413a---solaxatoxapuw.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/6143d3d33e034.pdfIn PDF document text
    • https://freebcard.com/ckfinder/userfiles/files/wusizexumuza.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/22500010612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=wwe+immortals+play+marketPDF 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_off0000d3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 10596 bytes
SHA-256: 164ec8a6e67d4d7f1c67cc140c842b519b2a955ae4c27c20a2110ba02344a13a
font_02_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 17988 bytes
SHA-256: 6cbe4016950194e75bcac92e9232185ec5ae10bc595c4ea64a2fb6d4cfccb68d

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