Malicious PDF — malware analysis report

Static analysis result for SHA-256 f945007f8c8c2bd6…

MALICIOUS

PDF

67.7 KB Created: 2021-09-19 00:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f3cf3e25ac6eed3c90636effaf39bd9d SHA-1: e254da81367c4e22eaa56a5bfd0c9f0ae4932592 SHA-256: f945007f8c8c2bd691c0017a77f532ff1e20c79fae0e080d98fec852cc5dc63e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded JavaScript and a large number of external URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are commonly used in phishing campaigns or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://laborke.ru/uplcv?utm_term=b+spanish+words PDF link annotation
    • http://nuuts.mn/uploads/assets/sapunemevenijidojarose.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/vepigokido.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/77247118168.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/tejakare.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614653c3c7f6d---40466148712.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/24493876980.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/90267489903.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/tifazafov.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/duzenevejokibe.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/84551034757.pdfIn PDF document text
    • http://gr-chem.com/upload/files/92992538110.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/e45getmcnchjcqrqpm29s9n954/mikuxowowozulu.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/joresiba.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/11966439887.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109151353161506.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/59827989554.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/avelen.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/30826135218.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/logodekixolira.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/zimuxut.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/9388433453.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630962185/files/32776212658.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_off0000ad1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1E 14704 bytes
SHA-256: 89123ded558cde080bd98da7aa36b577174b027e3f415711ea01e65daa27587d
font_01_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 10352 bytes
SHA-256: 108a8ebc7c298fe05db84340f9e9e1a4e47e7f0fe14e226643eb1a4a093b16db

Open this report in the interactive analyzer, or submit your own file for analysis.