Malicious PDF — malware analysis report

Static analysis result for SHA-256 faef9b3a1e420888…

MALICIOUS

PDF

83.7 KB Created: 2021-10-05 21:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c08890ee4da7266a64e8077a22af1e86 SHA-1: 0149256a27febeceb01eaa0f824d3ac5fd3e0292 SHA-256: faef9b3a1e4208889fe42c7e494bfd520ecf3fa013ff49f1b376ac8eac4f76d8
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier strongly indicated maliciousness. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users. The presence of numerous links suggests a broad phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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://wastran.ru/uplcv?utm_term=pulling+out+infected+tooth PDF link annotation
    • http://mabifitness.it/userfiles/files/wudineziwilozuxo.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143c0642de95---21116104864.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/fajolewapuveri.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/binidamu.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091417161990.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/saxazasiwaj.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/9769899507.pdfIn PDF document text
    • http://lactopad.com/uploads/files/zizamudijevig.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/59635348939.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/faxipajedegopikoda.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a04c421fc99bb81d340f3d805f1d740b/xidade.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/vobibitimobusuve.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/ruxudexenijisedipapepoki.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/wuwexotem.pdfIn PDF document text
    • https://semot.com/Store/userfiles/file/51567185851.pdfIn PDF document text
    • http://haki.tincorner.com/uploads/files/55085444126.pdfIn PDF document text
    • https://carlojans.com/cms/file/71066875565.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87477799116.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/51052382346.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/14598806584.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/85447757479.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109070427362747.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/linesabosojenuxa.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_off0000e2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 10424 bytes
SHA-256: 3e2db0188fb4f5306014d9ec9c65444b5546e4ab0e54bd12903b29bd8ad1894e
font_01_sfnt_off0000fa15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 18584 bytes
SHA-256: 5ecc98eefbd073df18c4eacf4685f6999c2294c17628a6b45e40f0dd5a91074b

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