Malicious PDF — malware analysis report

Static analysis result for SHA-256 510005bd00f646f2…

MALICIOUS

PDF

75.7 KB Created: 2021-09-10 19:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 4055acbbcf6be7175402770df2243f9e SHA-1: ded52d1b9975c9e5ee433039c779147ec85e4c66 SHA-256: 510005bd00f646f24c3b48038ae9f67c1d4cf640c8e8ba2844da2bf4d17d2dd3
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://masihpt1.com/contents/files/mogefanabawegawafezofi.pdf In PDF document text
    • https://momentous-inst.com/uploads/image/files/38353243490.pdfIn PDF document text
    • http://zuche0551.com/upload/file/kivovokexopaxiboxele.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/puvezikanogan.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/zugim.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/xamomekekokaluganexozila.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/59929094406.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/roponigirodasoguresazeg.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/7962224126.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/24417740180.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58965482011.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/13634436460.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16139677b56a83---96813048426.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/22937475278.pdfIn PDF document text
    • https://istanajp.net/contents/files/wabefufaf.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/60454522336.pdfIn PDF document text
    • http://pb-book.com/user_file/file/8039262157.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/dozuki.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/29334560660.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/83508652148.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/jepajowunu.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/folapulimejawozezo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f302326a8f---83319254657.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132455e1d849---xezidenabebunedogex.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/69663311748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=top+10+live+tv+app+for+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_off0000c6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000debb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBB 10524 bytes
SHA-256: 3f541ba4eb0550aa3aa7e649c06264ffca04ca0ccbad0d3b4504059966ac8326
font_02_sfnt_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 16308 bytes
SHA-256: c93938d91cf1078a8eda30e9eb3c2bcc98b15d1cabc525850ed5725a93ffd2a6

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