Malicious PDF — malware analysis report

Static analysis result for SHA-256 1348819a98ef8510…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 17:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c25dd4639034e9fc65e7e5c1116fd43 SHA-1: 90d19af2eb482b859de1f833968f9f48c3e5b1be SHA-256: 1348819a98ef85102b6e3681104d9db42b8d788a668b88403580252617be11c2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ClamAV as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick the user into installing something, a common tactic for credential harvesting or malware delivery. While no scripts were explicitly extracted, the presence of embedded URLs and the overall heuristic profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://mauchlineware.com/html/chapelstreet/web/userfiles/files/buroru.pdf In PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/70685678528.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/55814226901.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/95642318465.pdfIn PDF document text
    • http://zonweringbelgie.nl/ckfinder/userfiles/files/deligaguze.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/ratawofaxumo.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/df71e6b4be8bcc2ddfe52faf03ebbf2a/6666815407.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/35790796120.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/78060679301.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/lewigunuzezu.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/27000450950.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/balaxalira.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/kekijarodesewejajo.pdfIn PDF document text
    • http://gibisch.org/files/files/nowamigiluvejodela.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/ripaxabajolutedijuboz.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/xizarogoloxi.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/30439216998.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/61873915114.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/jabofojedugoxarole.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/10707362197.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=missed+call+alert+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_off0000dba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 10356 bytes
SHA-256: ec8fb6df82b79147e124c35af3a4e96049cd34b52d0635b94779dcc8ab0e1231
font_02_sfnt_off00010b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B36 19632 bytes
SHA-256: 974b65408c338216f1e7eb16279e2fb5be709572d3c4b6491e47373e5b2841ef

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