Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e28009e1117fe0…

MALICIOUS

PDF

69.3 KB Created: 2021-09-16 04:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e89c430be2a44321696a23c0117fc25 SHA-1: 0ed98c1531b0f9188332ed9368ac1c7e04d0b8eb SHA-256: 50e28009e1117fe0c70ce1bfd6442559f2a146b24c82f3276bd5c12511ff44d1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external links and the nature of the hosting platforms align with techniques used to obscure the ultimate destination of malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7954

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://oniceh.ru/uplcv?utm_term=monster+minecraft+apk PDF link annotation
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/voxataderub.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/galogoboripamege.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-14/20210914092650460530.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/sepobixivevizazitazopofup.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/xixamarigijok.pdfIn PDF document text
    • https://tdfstore.it/file/lukewatub.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/4c6a9f4929f486431ba5c7671be7b81b/42254257152.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/71134295045.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/vegakufijomuvosi.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/fokepanubomijakiwiwafu.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/pesipafebovak.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109101338054137.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210914005619_462062568.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c744273509---97544288281.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/76578141437.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3961d984e09b4ca95bf0f33d1088e929/mapejunelemafow.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/sezetifakugudijuwe.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/02/zegitusixilajaxovoguroniw.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/detazulebibu.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/j15dgj6n1h2ou877v195i0abp1/wunetelumilotelovovefu.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/97868527027.pdfIn 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_off0000bb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB30 10680 bytes
SHA-256: 3441648e3ae546a11b8bd1031eeb1e510a80696ba9093d6ee065cfaaf08c2830
font_01_sfnt_off0000d3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 17000 bytes
SHA-256: 8b14fb56891c231b61dab1102cb3a3bf98d347587f2cc22fc5df20f15a2fdfd7

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