Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be94b287664bc8e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-17 05:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b8e459bf5d80eb6dfa4b8abd2f966497 SHA-1: 453353cc239bba37a593e22c743606a5f5ceac48 SHA-256: 2be94b287664bc8e17975d9cf654977d234db727f441684688df54ff7a57afaf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of embedded JavaScript and a large number of external URIs, many pointing to potentially disposable domains, strongly suggests a malicious intent. The embedded JavaScript likely facilitates the execution of malicious code or redirects the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e4fe69c2fdc5d395aca2fd3124d225e4/87576208307.pdf In PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/metalituzavuxifekutibe.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/noropakili.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/refotetasekakivuzabog.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/33062885911.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/ximilotigatatones.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/1087580797.pdfIn PDF document text
    • https://kamwalibais.com/userfiles/file/78933181886.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/dubikotegedupasisiz.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/mezuzaxi.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/6688046288.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/fibilubisemupoz.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/wudax.pdfIn PDF document text
    • http://trovas.com/userimages/1504711032.pdfIn PDF document text
    • http://handgun.ee/media/file/76828710321.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/22055479805.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/49477809718.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021914116227303.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/82573288711.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/26642405556.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/83278970396.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/bekuvilovorojoko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=bhag+milkha+bhag+movie+download+480pPDF 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_off0000ccab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAB 11316 bytes
SHA-256: 28970c10ad07e73b8dc46063f595e10081b3a2be7b345aff7f089141fa5af285
font_01_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 18196 bytes
SHA-256: b89f5f39d52da9ef55bd50ff12575b3743687032b3555e04da92c1ae021278d2
font_02_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1