Malicious PDF — malware analysis report

Static analysis result for SHA-256 d310c03b4e810cb8…

MALICIOUS

PDF

69.8 KB Created: 2021-09-25 10:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e110693229a5127231f46bd7e9a057c SHA-1: f6830b8ba40456f76b1e22c78ae9e64d1740debf SHA-256: d310c03b4e810cb8b3ca2fa432244eb592076587c9822ef56cae99cb430912aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or distributing further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, suggesting the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=watch+the+conjuring+the+devil+made+me+do+it+free PDF link annotation
    • http://studiotrusso.it/userfiles/files/dokejedufaguromezefivew.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/titolerogikigix.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/7595620960.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/90596571156.pdfIn PDF document text
    • http://gazetavk.ru/img/file/38962246514.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/rijutopuletipakufabizaxil.pdfIn PDF document text
    • http://ranch.pl/files/file/53891780665.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/majazatum.pdfIn PDF document text
    • http://webmba.fr/client/logo/file/fodifipuluvumilegefenozuf.pdfIn PDF document text
    • https://produse-zilan.ro/files/79948684125.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/vigokipoji.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202192124956936.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161425fe8d3679---38460154911.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/delupupiloje.pdfIn PDF document text
    • https://satesayap.com/contents/files/liseledajusi.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/dugamixatukazuxixogoj.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/lejarola.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/81c8d5d242d91d405a4b5ebdc60b876f/11594045377.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/54112873158.pdfIn PDF document text
    • http://agilesolutions.in/uploads/8995491031.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/88204988119.pdfIn PDF document text
    • http://sushifactoryazusa.com/uploads/files/tugiguramiviregorenodeja.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/84022699712.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75663335744.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/81080811898.pdfIn PDF document text
    • 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_off0000affb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFB 15216 bytes
SHA-256: 0b46bcc03c52f23a1f9ded789aaaba5c1c0f6b368019276005d61196284fbc39
font_01_sfnt_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 11044 bytes
SHA-256: a4f0a769e17e8c0fcc429a7c40dc9d5a449be73d3171091103fcf35c0a538bd0

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