Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba6e9c7de730c90f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-02 10:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 639dd458ce3eacfa7b17de020f5457b0 SHA-1: b10450a18193ede0c8b8e13203935d950397c8b2 SHA-256: ba6e9c7de730c90f4a6053323b0df3e54f1c3a5b92c785a4de501859aa362332
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised CMS uploads or disposable hosting. This suggests the document is designed to act as a lure, redirecting users to malicious sites. The embedded JavaScript likely facilitates the redirection or exploits vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lpkgoodframeupvc.com/userfiles/files/bidixojofasefajizu.pdf In PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/lk8eqeogll4c79chl039771jem/45253289562.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4b419c6c561195cde22ae406e9bf6a13/wulakajuto.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16091e315e45be---gununanesajifuzeminugaru.pdfIn PDF document text
    • http://ziva-muzika.cz/files/file/79692909644.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/dafad10994e25f55644bccebf834d19e/53329363068.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/polopewutigazuxigijajono.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/xaririmubopumu.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/gavavizesosivolezubel.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba432d8d0---22181945525.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed9ddd281a---39853181782.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/3c62390be37b6295f0ea6a3d6f3897d3/raserabapojidusufitadi.pdfIn PDF document text
    • http://architettodrabeni.it/userfiles/files/63427570186.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/97228071304.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e8fbd2439b115e407e414a8343f6c0d7/8395102803.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608185a058022---74075489385.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/30752254060.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/73060390441.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/28822617609.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe50b70b1---3110115710.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/jejenukojimasavutaf.pdfIn PDF document text
    • http://schturman.ru/files/files/9168515224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=coffee+and+sarcasmPDF 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_off0000d963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD963 18244 bytes
SHA-256: 46f4abfa31ebd83c38a3d8f42793052de84e603cbc8c97657e7f1846dba00f91
font_01_sfnt_off00010809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10809 10432 bytes
SHA-256: 1f20e78b6b97ff08a0f8fb9f57e3c7709d19d7af977eb397b3d99570ab9c6307
font_02_sfnt_off00011fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1