Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb6356c9e302c073…

MALICIOUS

PDF

77.6 KB Created: 2021-09-19 15:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 33472034c3c5f9d8122a5e7adc52372a SHA-1: 02af06981f6505a60a01b9dfcad9014b72f92db7 SHA-256: eb6356c9e302c073f593e960ecada36accd2d76ad94c7da8d3424c3cd1b0d129
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pistant.ru/uplcv?utm_term=old+version+wattpad+apk PDF link annotation
    • https://sdhouse.info/ckfinder/userfiles/files/nikikujam.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6fba1cf5b---mokojetom.pdfIn PDF document text
    • http://halaljones.com/uploads/files/90404802270.pdfIn PDF document text
    • http://affectif.ro/data/Image/file/jalomutajeloxomul.pdfIn PDF document text
    • http://indexone.ru/upload/file/wixizeramuk.pdfIn PDF document text
    • https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/vexupawawixutugofevor.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/lolamejefimopixotomomu.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/bojosonopesepejadev.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/bupoxamevabepigesaled.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/2237159628.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/kuzajulasagovoxe.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/80995931864.pdfIn PDF document text
    • http://recepti.plovdivweek.com/js/ckfinder/userfiles/files/wuwawusexekafalidejap.pdfIn PDF document text
    • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/7635856236.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/bixilolisab.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613615c602f27---930292343.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/87301654438.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/pigijokibewodogexid.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/10890242594.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/mobap.pdfIn PDF document text
    • https://htcpost.vn/vietpost.vn/img_content/file/desolidorum.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/zixisepab.pdfIn PDF document text
    • http://rts-3.ru/upload/files/23982682229.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_off0000cc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 10652 bytes
SHA-256: 5d3fed57d8d439dda2736e829e67c6de4a74fa40216ef9083fc870bc7dffa4b7
font_02_sfnt_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 17140 bytes
SHA-256: 87cfe772c3643a87ec9a5585545c04b94799e58f6d2d6aef1d5e0d054673d83f

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