Malicious PDF — malware analysis report

Static analysis result for SHA-256 06208ce0df537b93…

MALICIOUS

PDF

84.1 KB Created: 2021-06-26 13:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 95f7cf3e645cd8670db0f4d0169d7fbc SHA-1: cbe6ff2ade26030a373fe3243c4dbfbe9ad3c154 SHA-256: 06208ce0df537b93b2109f61927d1eb937882751169848982bba81cd19c2e1f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to redirect users to phishing pages or download further malware. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or malware distribution campaign.

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://inwebjor.ru/uplcv?utm_term=190mm+to+inches
    • https://greenvalleykerala.com/ckfinder/userfiles/files/81969479928.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842371f011f---zuworugalegakomowob.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46d01a6d72---goxetinevuzinileduji.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/55993a349219fd20f138fca7308372cf/74256439042.pdf
    • https://autoprofi.ua/userfiles/file/69273023420.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/2fea342f7c5fe1d6dbc1f2ce832607e3/43896751980.pdf
    • https://uppersanduskyrotary.com/cms/files/File/negenubok.pdf
    • https://tsegypt.com/file/kamiwovadiribisegoluba.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6b1152934---57718487500.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6a33b2dcf---tamalenadipewifarubelok.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496fb25e97---66256536514.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078272ac273e---pajakon.pdf
    • http://solee.cn/ckfinder/userfiles/files/wubedigew.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/47d134fbc0a57151b961d99322f73c6a/lizenip.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e9b26aa3e9a5e92da0b48e77250b2785/47087391985.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/5ssoe625otjkun3ooqbpsrtdn2/12753339702.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16070a3649b169---lugapiwexopemel.pdf
    • http://sungsam.net/userData/board/file/luviparutojeratira.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nkrumd5q8gepeno0v6v36dqti5/3268619709.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/76782113528.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7d69857c---40959450597.pdf
    • http://cuacuondaiphuc.com/upload/files/vitudaniwabija.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/592b7abd37a8d628899932671f21767e/lipuvazab.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c16f36fc5195b0350090f9ca42816e4f/46508567535.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac62137df3---bedapilirejusubope.pdf
    • 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_off0000e767.bin
769e0a6d3c888fa1439b3f06edff23cdcb5247c9ae86e25b7aa4af77aa35de66
pdf-font-stream PDF embedded font (sfnt) at offset 0xE767 10432 bytes
font_01_sfnt_off0000fee3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 16792 bytes
font_02_sfnt_off000116f5.bin
4e7137d04b47a7e8cc79a2ea3afe8e3ac4f520665358776695562db47dc10d44
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F5 16988 bytes