Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bec018e9ecae2aa…

MALICIOUS

PDF

65.1 KB Created: 2021-09-12 08:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3bdffc67e942c3a6589db8aacd5bd79 SHA-1: 3e291ace46d64fff16cdbf616debb6bb748ee959 SHA-256: 7bec018e9ecae2aa260e4d98a2baf624bf83aa179e50e770a44e68a9840b7d59
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect the user to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6279

Heuristics 4

  • 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
  • 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://alajwakh.com/uploaded_files/userfiles/files/polajuranokaru.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/4ef279d90562182b4d6e07b27bdfb8d4/jomebixurexesofe.pdf
    • https://tekartltd.com/upload/files/69334647009.pdf
    • http://hzbmsj.net/images/upload/File/86913658374.pdf
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/venusowitusofosijojenob.pdf
    • https://ecoverservice.be/gallery/file/56802019278.pdf
    • http://sukhonthip.com/file_media/file_image/file/40124505245.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/moworusixilo.pdf
    • http://mzch.pl/userfiles/file/60878665681.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/xovamamekeveputuguduwu.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/51203488425.pdf
    • http://khaskhaan.mn/uploads/userfiles/files/92860037026.pdf
    • http://www.singchai.co.th/ckfinder/userfiles/files/42008989422.pdf
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/turizorabule.pdf
    • http://batterseataxi.com/survey/userfiles/files/27090818936.pdf
    • https://3rproject.eu/ckfinder/userfiles/files/40763762825.pdf
    • http://krr-nfe.com/suratnfe/UserFiles/File/81831044075.pdf
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/nonifojobejowetazemuro.pdf
    • http://unixsensor.com/uploads/files/202109100611255983.pdf
    • http://shahgrp.com/uploads/mavevuwokonudodig.pdf
    • https://girilawfirm.com/content_files/files/dixajepawudafoxawasoniwav.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bo2+origins+fire+staff+upgrade
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b475.bin
9a010e74253989f78b6d2b15480459b4a40d8e050353b923ca6b562056d7f79d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB475 15816 bytes
font_01_sfnt_off0000dcc9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 16792 bytes