Malicious PDF — malware analysis report

Static analysis result for SHA-256 050f2d9ee308e81b…

MALICIOUS

PDF

85.2 KB Created: 2021-07-16 20:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2eab27572c185cea0b3ee86c5c84ce7f SHA-1: c5e468887ce38e4b77f849a26f62bc33d8bb6e86 SHA-256: 050f2d9ee308e81bc5f2eaa4c02824ab5350bf9951f832d0efbed9e86bb07d6f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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 https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/64bbltcs9misoqeldaj789elvv/vefinivofesorudop.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821bfe3de10---polok.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/95338359170.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/jadidanula.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/42df53082c66be48bd7a691c2af71914/keronilakorebiluleg.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/9i4mfpj7f3s9p3gbn0ueb90al7/kilovif.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/68099920183.pdfIn PDF document text
    • http://fygl.net/uploads/file/190253531494.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/5867660464.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/fejamebosaviwut.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/75221210491.pdfIn PDF document text
    • http://leton.pl/userfiles/file/marakorime.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16079518e0e437---4241594676.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/59698921193.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/95792511781.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/65612539400.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44391de574---minixogulejewunivotutemo.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/zubew.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d0cc15ec---64473837593.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/in3al7k4ji9hnl3plj1v12covu/15608305580.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/viwivadozunuwiburetogisom.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/431ed0b0e376c7b8f29136ef7192f1fa/pokizoxejuvokita.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608269dc7bde0---fakitogabamedaduz.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/xuxew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=risk+dominance+game+theoryPDF 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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 17904 bytes
SHA-256: 4cd44eec980b85376d2004b532b22ad6a90cab5ca9dbc4c8111690fb690e0518
font_01_sfnt_off00011663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11663 11024 bytes
SHA-256: df0a79d262bd2e716bd60dd8dc4a0322d69b8b31ff3a9d2e1b0936f46f7d9c63
font_02_sfnt_off00012fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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