Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f13f787f5710282…

MALICIOUS

PDF

62.3 KB Created: 2021-10-04 04:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 39e121c08386af9c13b89b41d9db7fca SHA-1: 73b39b4214abf8a6483ea017353b3c8dd0bb36fc SHA-256: 9f13f787f57102824df045918b81cba036ff77e2b55fe27f035f84aa3f691a74
94 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs pointing to various domains, indicating it functions as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, noting a high number of distinct hosts and UTM parameters, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4242

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 https://oniceh.ru/uplcv?utm_term=songs+offerings+by+rabindranath+tagore+pdf PDF link annotation
    • http://physio-praxismitte.de/userfiles/kigibituvetol.pdfIn PDF document text
    • http://nusratali.com/userfiles/files/bumeripolurapebox.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210923_AD0907FFB5054D45.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/56882679181.pdfIn PDF document text
    • http://usagimatur.com/files/others/depaladaxogolojuwawezu.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/6165281197.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/40924873996.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents/files/vozozitiw.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/24475893763.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/tinevugewi.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/97258513132.pdfIn PDF document text
    • http://schokofontaenen.de/idata/tebisomes.pdfIn PDF document text
    • https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/98765426077.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/xilez.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/fosixijibiz.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/77188091661.pdfIn PDF document text
    • http://chinalabware.es/d/files/34072606313.pdfIn PDF document text
    • https://masukpt2.com/contents/files/nipuxudumoluvutekujaza.pdfIn PDF document text
    • https://orrizon.ru/images/file/17427891164.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/44574936984.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/sufajuko.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/tufanutov.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32360683016.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/fff11780452617b4efc2de6c3c7c0d1a/fexepedelejirod.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB154 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96B 11060 bytes
SHA-256: 3b5fdd2e18eaa18d4193e1c37c95f126d3ef7563d447cd2d88eb9772fdb2c8a1

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