Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0abe561a8bf150…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 06:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34a3f46a833e89d15691d268641ea26b SHA-1: c4fe9a3dfcd253606b0c74dc53d53bfaca544c32 SHA-256: 8f0abe561a8bf1500ba28796da0661d42c50d33dd42aae51941981010191eb97
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggesting it functions as a link farm. This pattern is often used to distribute malware or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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
  • 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://kengosushionlineorder.com/uploads/files/35335555845.pdf In PDF document text
    • http://ourconn.com/userfiles/file/202109082204359359.pdfIn PDF document text
    • http://tieuhocsongphuong.hoaiduc.edu.vn/ckfinder/userfiles/files/dolurizolizarutolop.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1654176124613e92671fbf3.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/46701887059.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/jaxow.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/32585934464.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/171388552.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210914081431.pdfIn PDF document text
    • https://jjpremiers.com/files/3090560487.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/0e3ffecb7b53b568a7fccd48182f3ead/bepezuluwezozi.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/selumive.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/lupekopujipelitegikariw.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/99507941408.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109111956238658.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb42152fc7---xisedifovu.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/55932881229.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/90185740992.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/siruvuzejixag.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/lonisogunubu.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/welelewixapizuvumotozad.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/28765435487.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/13014497917.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/xivetodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=harga+android+merek+hpPDF 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_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 10608 bytes
SHA-256: 1675064dd7104870a70bdf70fd826ee7514ffe257d72f6281332c411caa29eae
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 17940 bytes
SHA-256: 41da54a80c5a6ede085df920e59341ca776203d4ab4c11872ad7b19962747bfe

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