Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff466d5cdd87ddbe…

MALICIOUS

PDF

72.1 KB Created: 2021-10-02 10:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 399f83b66f95a7bc81e195c3a9a56fa5 SHA-1: 8d2ee35a183bff705fda87c8729835223e2c818f SHA-256: ff466d5cdd87ddbe2fdd7ca336f7f246d237f0c97f602b948fa305431c6d18e8
134 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 domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://riwg.in/userfiles/file/fafijukaliledipurenu.pdf In PDF document text
    • http://amphorabeautyclub.com/campannas/file/51954756416.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/zawekugegaz.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/98675334705.pdfIn PDF document text
    • https://mallenmediations.com/mallenmediations/images/userfiles/file/91023671700.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/nuvofix.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/rinitekevuvi.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/luxidajikusafunuja.pdfIn PDF document text
    • http://www.yemany.com/yemfiles/files/49349291221.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/3873010155.pdfIn PDF document text
    • http://geotersrl.it/file/97694269046.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/11473110803.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021092110040373499.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/96672379775.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/sudaxojux.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/kakusajopek.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/61536308730.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/83845003493.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/38183311996.pdfIn PDF document text
    • https://ises.smithpressautomation.com/phpsites/vertical_living/uploads/file/tixoretonizajobetinokaz.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614334b689f8e---kijotusizugedelet.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/18761028317.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/rotegutilemirakasalamugaw.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5692178628.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/77822512685.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/6801542819.pdfIn PDF document text
    • https://senfina.top/uploads/files/xitavej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mcauley+convent+sisters+of+mercyPDF 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_off0000b657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE69 16932 bytes
SHA-256: 4c88dc4d1ca8461cb004166f2c24bbed2e0dac37a7409fde27410909cec94356
font_02_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 10772 bytes
SHA-256: 550db942ba569d3a52b29e45cedd77e07c4600e702f57f9efced1df977d919b1