Malicious PDF — malware analysis report

Static analysis result for SHA-256 69383fe4327e2694…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 04:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d926921bdbfd0b30b80840550bcf1192 SHA-1: 02a02d6c7bf8cc71dfc373008eef1deb81ff513d SHA-256: 69383fe4327e2694401143b8a2507177ec07a70ea35a72d2500a4ccbf7c7c230
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which are hosted on domains that appear to be link farms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and the presence of many distinct, potentially malicious links suggest it's designed to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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.
  • 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://csc028.com/userfiles/file/20210918055031_pupyh3.pdf In PDF document text
    • http://amirafouad.com/uploaded_files/file/3748118334.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f774c39c2b---23847567803.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/bofiwanavukowexugif.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/liwufavosixaxaf.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/76441135361.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/majilabimanesajeporojo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/71c2f01f861760eb61a5fc8b85bbd5f3/56575974248.pdfIn PDF document text
    • https://ebus.myskoolapp.com/FCKeditor/FCKimgUpload/file/jarobuwifipasuzobiralo.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fofopuno.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/79106731498.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/sowizosuwitufovurig.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/mananov.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/5860633761.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/13066318422.pdfIn PDF document text
    • https://sabagdasarov.ru/upload/file/gobedo.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/50363235276.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109091219377148.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/92148718735.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/19183703363.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/fibipajetogofida.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-4/20210904210417582542.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/73868766439.pdfIn PDF document text
    • http://njboyuanchem.com/upload/files/zozojunusafagem.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/rurepasatovetomusivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=art+of+war+mod+hackPDF 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_off0000d96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96E 17740 bytes
SHA-256: fbea44f8e08036b8f08cb078b7264f099d5b4051a45a24f28b0b9f2763a32e3f
font_01_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 10360 bytes
SHA-256: a0dc01d2e4081aca93aa26118e5b714abb951c981935a8b02762acd0f1d66392
font_02_sfnt_off00011ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1