Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8e0c74d3684034…

MALICIOUS

PDF

85.3 KB Created: 2021-07-06 21:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b9aa6fe3ab568dfd4af829ee90b359d9 SHA-1: 807f904cef34723cbc507fea3ee9cc5b60301ac1 SHA-256: ba8e0c74d3684034ae08ef083a1f1d397a682a715e8dc5bfa97baeda85fa57c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=kendall+jenner+one+direction PDF link annotation
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/siduroxemenenotareviw.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/34877821814.pdfIn PDF document text
    • https://shidoremicrosys.com/media/48308180475.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4588180cc1---fudavojaxulixeve.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd6bf34aac9---55218068443.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/9g2uo7u13q9jc7v4mug4668uqf/xiperapos.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/282khk5nrffvihl6d31fs5n061/filevow.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/51nngsin1d3mtbkelok7knsvcb/bizoxinomosubena.pdfIn PDF document text
    • http://e-sportis.com/images/upload/303205669.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/6436034423.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/75855367462e5d1437d7d34e72ec3262/bofuwabivo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757ee9dd650---37897073168.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/kegowujebefajomuw.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/41797775795.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/9e468d3c5c90ed15996d622cde702900/zofuviwenebeter.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/13adc65bcf2fd66faee59ff1bc253329/61750695272.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/75364813531.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/7941118982.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092b4049a4fc---44244227931.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607992ada9749---botubuve.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202106151501.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e259b4fc76---kevifodeduma.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/55154758643.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 10316 bytes
SHA-256: 02eea08ac8c23e262cbdf3ef7eb5cbe9bc33d03c607a216e1a481b37e1b21643
font_01_sfnt_off00010310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10310 17308 bytes
SHA-256: a04b30a4cd75db321d93547cc995c4320fdcebff3aa1abaaa0d824e3c8451746
font_02_sfnt_off00012ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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