Malicious PDF — malware analysis report

Static analysis result for SHA-256 943701737d1878f6…

MALICIOUS

PDF

85.1 KB Created: 2021-09-14 12:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b847413307c62d7a0d45a0cab0c0230 SHA-1: a38a6f6f06644503705e8e28a65dbe26324479f7 SHA-256: 943701737d1878f63a8065e488e7505dc49fc8735c78ff3d4b267be0b9f4d03e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links, many pointing to potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://allier-genealogie.org/File:/45609016911.pdf In PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/29168952344.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/38071682637.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/tuvotorokakamelonifumamos.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/jalolekenikeremotebesud.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/vakiguvitukape.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/59473438345.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/nitobofelides.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/37229225425.pdfIn PDF document text
    • http://ormansagszive.hu/upload/file/lotapirubovoxujalafu.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/sefudivajekipekowefamakil.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/75889368472.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/23931556431.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f6e567aaae---belafu.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/xofapip.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/zuwipuxiserifowasofis.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/tapepotibakefu.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/fosalorisifupome.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/2873001695.pdfIn PDF document text
    • http://artdental.hu/editor_up/73045975350.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/69382853490.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/gifab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=clash+royale+free+gems+no+human+verificationPDF 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_off0000dfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCC 11096 bytes
SHA-256: d47b9920d7c00fb71a594588b52cb8004d404ab8aa162b5db38aafb25620b718
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 20156 bytes
SHA-256: e38adc4f56e99e2c5aa2d82ee8c2d94a7d0fc16a5ec08b361b93684349465ac0
font_02_sfnt_off00012e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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