Malicious PDF — malware analysis report

Static analysis result for SHA-256 b090fdea2c1c29f2…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 10:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4de7653ab0b31e41fc72605631aadac SHA-1: 824fd484030ceab492bc870f10edbfab1cb81030 SHA-256: b090fdea2c1c29f23792fa4b38a82edf93d2673dd788169af292f00efcad6eae
126 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to potentially compromised websites or link farms. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high number of distinct hosts and links, suggesting an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16155e48d1c056---gezizodep.pdf
    • http://ambulatorioveterinariomariani.it/userfiles/files/rapidowedeles.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161518507278c1---48737626690.pdf
    • https://braveathlete.net/geektic/files/17014326996.pdf
    • http://ingegnasrl.com/userfiles/files/85053454299.pdf
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/56728962230.pdf
    • http://getsolarnj.com/userfiles/file/63620321694.pdf
    • http://22vek-omsk.ru/fck_editor_files/files/zepezazowegamidizanuk.pdf
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/24181697923.pdf
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/basijazonopeja.pdf
    • http://holztreppe.pl/userfiles/file/batuganolasivo.pdf
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99408752492.pdf
    • http://tahyuh.com/uploads/files/202109201437506385.pdf
    • https://iva-vietnam.com/userfiles/file/vowozifonubepabokirosumab.pdf
    • https://partroyfuneralhome.com/partroy/assets/file/66310924907.pdf
    • https://inprovitchile.com/ckfinder/userfiles/files/vebugusifopopi.pdf
    • https://maritime-models.com/userfiles/file/97158169520.pdf
    • http://scbczy.cn/up_files/file/20210909_065846.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1615848fed47b5---86553743092.pdf
    • https://rayvoltbike.tw/geektic/files/busujuwiw.pdf
    • http://paramountswimwear.com/userfiles/files/35880633474.pdf
    • http://aliguoriarchitetto.eu/userfiles/files/lofinegimozudokoredo.pdf
    • https://www.vignolaweb.it/ckfinder/userfiles/files/67572869231.pdf
    • http://automsystem.com/UploadFile/file/20210928195253204.pdf
    • https://topupdana.com/contents/files/24151816702.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+set+master+slide+in+powerpoint
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0c1.bin
e30205751621dde37f8984ef223334649efc6e3d9dde79d2160851aef5d6d13c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C1 10632 bytes
font_01_sfnt_off0000c90b.bin
40d28f3ac553b8a5c073fec0c155c04cb7c3a86854e2ceddea0b370942c77946		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC90B 15608 bytes
font_02_sfnt_off0000f0e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 16792 bytes

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