Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e10fce44db3e61…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 22:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a7253497053784f99c80c0629927fd6b SHA-1: b2196a4bf253f766d0ad70aa0b72d63cebf34300 SHA-256: 63e10fce44db3e611b7c4beb876a703f15d7206e9ee9814f9bc29c56efbaf93c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to various domains, characteristic of a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the high ML score indicate a malicious intent, likely to redirect users to phishing sites or download further malware. The ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://invision.buzyhub.com/files/petoronufa.pdf In PDF document text
    • http://bangkokmagnetwire.com/ecodev_test/image_system/files/xibakowimafodejitokabezi.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/sudezimotefedome.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/78930372890.pdfIn PDF document text
    • https://schmitz.cz/res/file/sowujez.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/fuxotupasexofevibofaluxox.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/vawusoximutudiwipema.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210916231558.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/45526760138.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/xisow.pdfIn PDF document text
    • https://losungversorger.com/product/file/gurifaxawugegagop.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/61193503763.pdfIn PDF document text
    • http://bluebossa.pl/files/file/36793014117.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/29204043961.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/73615300356.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/2465983092.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/86348622593.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/kuwiroduk.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/90015249573.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/27271579177.pdfIn PDF document text
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/kikanixujoto.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/sozomawozoveluforekugupo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/bb89ccd6e8e1d9233a0b1f155296bfc4/sipifobidizizowodewipunom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=telegram+messenger+app+for+android+free+downloadPDF 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_off0000b705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB705 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF17 16828 bytes
SHA-256: e293f2e2d73b7a300c91cbbfb22e4d405ace887be8f9dda2e54cf8d921a13eee
font_02_sfnt_off0000fa03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 10792 bytes
SHA-256: 98221e55212af5351cc76dd211e26b5eb9abfbf8735e9e5ed3e12af225d44b47

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