Malicious PDF — malware analysis report

Static analysis result for SHA-256 2097a4e2145dc6cc…

MALICIOUS

PDF

49.7 KB Created: 2021-09-25 08:31:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: afb776188a1a0c147ac1056dc73c7916 SHA-1: 98ddb085e04bd5e02d4c440ec617a404cf731e60 SHA-256: 2097a4e2145dc6cc8d4d3e14d36a7899b6ba946bca0613444facf18e7297c0e3
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, while many are unknown, point towards a strategy of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9611

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://hotelbasantresidency.com/uploads/kagupunevisixoboxadibit.pdf In PDF document text
    • http://progetec.org/userfiles/files/valolamegenejevuguwe.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/69496893823.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210906232931_d0ezo2.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/wibenulalomowabaminuzeku.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/laxexenunidafekapuv.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f20c58851---62716881420.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/10720823953.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614dde01a5589---mefomelimivitolu.pdfIn PDF document text
    • http://climtech.com/files/files/89470177216.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/nujuxezulaxemivowutesusiw.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/67888147834.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/zilowazebemubeten.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210902073241.pdfIn PDF document text
    • http://adice-area.com/pictures/files/6030916734.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/dizavazupawokebaj.pdfIn PDF document text
    • http://ailizia.com/userfiles/76650074979.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/35613140372.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/morixafuj.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/gudefasip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=random+pointless+factsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D5 14544 bytes
SHA-256: b0db8a256d89984f5a8d0f3f09b738b6818cf9d6ed874952f6721680e7728b1c

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