Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee9d0ee7d49fa7c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-06 16:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6d670b2ed8ba849b44b697b5ffbf51ad SHA-1: f0abde0a5dbf71f79eb8fb4c40a8931b1afa1f37 SHA-256: cee9d0ee7d49fa7c55f79fd801ddd7a28541214a071a01f35d2e58b375852434
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised or disposable domains. The heuristics indicate a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://driver-jazda.pl/upload/file/pusogodakajegijuro.pdf In PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa99781e291---zenifefojosume.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210717044122787.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a3a8d956f72c5a8ccc86c9e131f9dc38/95413142281.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/pojagokaguwubataludofu.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/seweduzuvosatufek.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/14882804760.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/18177870640.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/71416636831.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/11662406208.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0378246e6c---5544411890.pdfIn PDF document text
    • http://cocoal.com/uploads/file/tixori.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aedcd0e910f---16975489376.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/2649240038.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3749003d0d---kobasomisobun.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/g21uk308fpmajt667ku0amg8p8/nipuvamokejoxenu.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/lapagegutixejanewoje.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/bifitatazugubuvov.pdfIn PDF document text
    • https://koreayokogawa.com/ckfinder/userfiles/files/34348412531.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/zubawidazufitunugibifawew.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/urbm5hu9ta7c52a0mqlqseggj7/xipodide.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=turbo+manual+cars+under+3000PDF 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_off0000d91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91A 10836 bytes
SHA-256: cda32a199c39d5aeb8e273b920ba1fe098ee77375cf629759c20f34374dd432b
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 16516 bytes
SHA-256: 25b85e46b8fdd717df4036cea79bf978c9163b4672c791fb2892c19990899212
font_02_sfnt_off00011ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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