Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ee9aafd3b8d86e…

MALICIOUS

PDF

84.9 KB Created: 2021-10-15 21:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 62bb828992de4ec046b81a30cb875333 SHA-1: 32c65e59a8c00ab9d95a1726063fd2c50516ad46 SHA-256: c0ee9aafd3b8d86e7f05db8c2f14736b91039baa8ad1360a1a5ab18c915449f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous external URIs and links to compromised CMS upload storage, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded links indicate a link farm attack pattern, likely intended to facilitate phishing or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://irlanc.ru/uplcv?utm_term=so+where+are+you+now+that+i+need+you PDF link annotation
    • https://sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615ccd64d9dca---62733683995.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/wawezivux.pdfIn PDF document text
    • https://noglehoma.com/ckeditor/files/files/98941471590.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/16758287356.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/juxukejofufokefiziwabe.pdfIn PDF document text
    • https://adproissy.emailingmanager.com/uploads/editor/file/44356060404.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161448219f19b6---lobetusubigigolola.pdfIn PDF document text
    • https://alpinashop.bg/files/dotade.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccaada4a2e---66319125625.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/sobok.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20211013_72979F035D098D5A.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fb15ecdb9---bonumutitirirosajasukeka.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/wepozubuwer.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-23/20210923144659462830.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/diletinon.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/pamodovexidoxijupemo.pdfIn PDF document text
    • https://e-midas.ro/files/file/dewejubojedurufajafegoj.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/lukifapal.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/85092335390.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/64777122153.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/47551474215.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615d220e64041---48980013193.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/73812380083.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/lebovivikukuweduxusezuwe.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/volitabebiviruruvele.pdfIn PDF document text
    • http://www.santabriganti.org/admin/ckfinder/userfiles/files/jubav.pdfIn PDF document text
    • 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_off0000e461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE461 10504 bytes
SHA-256: fcc098498d94f54ab60fa15e0991eb698a68b3b0f877c6d4fdfc158e2c3ae64a
font_01_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 19176 bytes
SHA-256: 37a256bfd4b26e03bb44dc0d095b5850139ab1c79ae6f0cc3a6a9db87da13870
font_02_sfnt_off00012dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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