Malicious PDF — malware analysis report

Static analysis result for SHA-256 0705059885c44ee9…

MALICIOUS

PDF

95.6 KB Created: 2021-08-14 22:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f0b8f6a5f47f463f33707d66953a089d SHA-1: 03478f80976fe2c36837eafc5e7d50dcc3e3a510 SHA-256: 0705059885c44ee9fca8c6f121f360c6324c0482000ad55e544f94589d3b7426
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript and link farm suggest an attempt to redirect users to malicious or phishing content, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/jisenepenovebikelivonila.pdf In PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec31c7c069---vidivuze.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/8965417916.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/kemesofojatuj.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/79f99a9570fcef24ea43880512487715/73148959815.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/72003356094.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/0b21c73e710d997994a3b2f9b52a626c/92543860468.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/b5e012451150ef1f8a1fd3651f061a2a/17049915829.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/58c3bc90267568f12abff3e8f430f9ed/jobovugojam.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/7392023013.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087db93c0b87---vikisabiduk.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/84561362321.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e099e288421---31728996756.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c886c3cd66---vobamuvololaxojexes.pdfIn PDF document text
    • https://t2sc.me/userfiles/71376234828.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fowipekuxedosom.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/705602367cfa164cc17878b3d0cf9aef/96603500673.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/akbptg3g299hvg0stigk43v6fi/67131450073.pdfIn PDF document text
    • http://apvn.info/userfiles/file/jewesewopidunekerog.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/8384564c1446afdc4e5febcc4735435a/63705745009.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/72269406098.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210625064959.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/baxemitusa.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/sivuwonimapegadonigalas.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/2741604617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=is+there+going+to+be+a+6th+percy+jackson+bookPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF953 17704 bytes
SHA-256: 0c5b265dc90c56f95afcfa0ed38fe4e6550ff95c1c78f7eedceb425d030ba27c
font_01_sfnt_off00012801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12801 11204 bytes
SHA-256: 67d41783b7744b282d7878c37c92952b29bdaec33c009ded1581383440b8f870
font_02_sfnt_off000141fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141FD 16116 bytes
SHA-256: 74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
font_03_sfnt_off00015755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15755 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1