Malicious PDF — malware analysis report

Static analysis result for SHA-256 150f48c64632ff9a…

MALICIOUS

PDF

89.8 KB Created: 2021-09-18 13:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3ffe2879126ed02ba470f3c255a726a6 SHA-1: fe1b99b7137b3ce0dbb6c26b7d89f2bfab146c30 SHA-256: 150f48c64632ff9adf7fc9da4f64245e1bd242ae29f2f1be93f81c57a2e9bcd8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://logo4you.dk/userfiles/file/nizuvibetomawurepobared.pdf In PDF document text
    • https://westhigienia.hu/editor_up/xadasurad.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/lesebupipisofusixam.pdfIn PDF document text
    • https://aayams.com/userfiles/file/21366024261.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/kifuxufudiku.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/99196154652.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/lewuzugusokasifiminunadu.pdfIn PDF document text
    • https://www.vignolaweb.it/ckfinder/userfiles/files/29523279515.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/8gnarnig8jld75kd23kqbtu3f4/gebazufov.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf605cb3e2---11349428076.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210903150157.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/26292627274.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffe9ac9acb---fenusimejuzadumefem.pdfIn PDF document text
    • http://atoutslegion.com/userfiles/file/79413287643.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210913_AE8AE216A22AEF4F.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613018ce5c269---taxusigolewuxifixaluruvax.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b228a5ad20---17881674965.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/wosupabenixulapoxeze.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/5535361257.pdfIn PDF document text
    • http://thongthien.vn/upload/files/14359343212.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9145690a51116b2cadf189ffbae16b9c/92077315597.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/99020574846.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/tarefemadutisipidudovap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=mr+nobody+full+movie+online+freePDF 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_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 19160 bytes
SHA-256: d2e9ac7d82ff2304e2c692c2dc0330b25ce743d0cd9ac25a17d6c86f57b31d96
font_01_sfnt_off00012975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001418c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418C 10500 bytes
SHA-256: 4b873ffa034494d0d715d828d4cb367fd33cc39309650616a8721e58178a4e88

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