Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4a93e00c41c257…

MALICIOUS

PDF

73.3 KB Created: 2021-09-13 06:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 714ec13cccd0038858793f3e4675997d SHA-1: ac6462ff14a46e35157e1824fc7460eb247bae9a SHA-256: fe4a93e00c41c25755ec9ea9ae0491aa586315a301aec312acdd1459ea01ce2f
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 0.9981

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 http://aloeverajuice.cz/files/file/14425871233.pdf In PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/xifiwogekefumad.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23521964079.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/40369775655.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/3232752509.pdfIn PDF document text
    • http://scea.edu.mn/ckfinder/userfiles/files/88872370022.pdfIn PDF document text
    • http://matras-devison.com/upload/file/28920816396.pdfIn PDF document text
    • http://jljemc.com/upload/files/salexepove.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/damepazizixupaji.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/16679573211.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/29461954465.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/78413300201.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/36687671503.pdfIn PDF document text
    • http://lovesenergy.nl/file/vedube.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/1657065024.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/87997471805.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c65c98eb11---36403540522.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/23704296630.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/damamamuri.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/80994883831.pdfIn PDF document text
    • http://videotour24.com/data/fckupload/file/24848694907.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/96364414996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=pes+2020+mod+apk+android+1PDF 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_off0000ba79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA79 17008 bytes
SHA-256: 95d74da5be285a29b6fd821e0cd8f2625920356e0dfc9aee374a35010cc65541
font_01_sfnt_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 10796 bytes
SHA-256: 57b80b8003dc3fabeba84455dec51b7620216b7e4e99372def71e6f59d94799b

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