Malicious PDF — malware analysis report

Static analysis result for SHA-256 2408d4e69893d6c9…

MALICIOUS

PDF

82.1 KB Created: 2021-09-14 12:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 10843a8ab213876e91d1293da90b943c SHA-1: d446fe335b0e4dda8286a91accdacb0e45ccd46a SHA-256: 2408d4e69893d6c9f0580b528acd86d95b0725eec2e7bb9c0654f9b6a2ce5d94
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://vouchertiket.com/airplane/ckeditor/uploads/files/86312341021.pdf In PDF document text
    • http://nofatrans-int.com/userfiles/file/27988600377.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/57781217477.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4db59dddf---kegedifemojujubepubizix.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/501101_93120973725.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/210901083209386985vmn6ha.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137083e3d5b5---27108854034.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/7639780032.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/mugetiwofupumesezobi.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/25943546971.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/77475965709.pdfIn PDF document text
    • http://reclameindex.nl/images/uploads/tedagilalepuxobeja.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/tejebevumususoduge.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/pibumatulusubibusiwi.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/radelibonuvapub.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/nunuxij.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/bakupadiwoturokugiwaratem.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/57841814253.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/vasirokediliweroz.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/7200021622.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/xuromomemif.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/30956651878.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/77232038934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+check+hotspot+password+on+androidPDF 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_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 10732 bytes
SHA-256: 5420e6edbaa78c199e7dd5ad987ef35147f5f3d8eac8cb1adbba2d99433da6d2
font_01_sfnt_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 17928 bytes
SHA-256: f78de5d23d71aa7334a9390f6f377f34c424671e5b23bff58bdf7bdb394b775e

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