Malicious PDF — malware analysis report

Static analysis result for SHA-256 0096ba2e3563b222…

MALICIOUS

PDF

87.1 KB Created: 2021-07-14 05:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c0bff1ebaafef8c8bdc377ee45c9df38 SHA-1: a2427f8389397b8a43507d8987d528d3ab22a15f SHA-256: 0096ba2e3563b222b091f04b410306c3c7d0c11bae01bef3d3b0e022b3fa0abd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or delivering a secondary payload. No scripts were extracted, but the structure and URL patterns are consistent with a link farm used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160825904343a0---67574222302.pdf In PDF document text
    • http://mientrungpetrohotel.com/users/files/rutonoravirenalaz.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/97635827497.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160b17adfe7e52---62199838589.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/69b8ed3a021ce4ec72df6e2d1227b30c/badik.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609065805fd82---40662589984.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453b36fe6d---81796381456.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/bizanafetolenulivip.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7eed4c7c5---13167503670.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a79d9e6f8---17214624446.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/82664106713.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08657bae88---28530699893.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/55284542706.pdfIn PDF document text
    • http://charivne.info/images/file/zutadujov.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/kojulokixofojitarukiv.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210613101834_ewxngj.pdfIn PDF document text
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/15359559057.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3a4d37c7f---fajomifep.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/jasonijeduv.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/degove.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef6606d906---66314107333.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/329bea4556cdea326ca722613d9ec713/jawedovilujoxuga.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/nenadisunitazozibe.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/pizevifupisugovubadipuza.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2bb5dfb6654c17c3d209389d5a09923e/lelupaxofe.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/notomidisenapafajusefes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+reduce+open+pores+on+skinPDF 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_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 10568 bytes
SHA-256: 82a8bdd9facca7bb3d922186d62a8a5e9258d519066ffa33cea97f018150ce9e
font_02_sfnt_off0001225e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 17096 bytes
SHA-256: 2b9dc5e07ee7ab52f8c677f25a8c7ec13433d582b057f2cd4a28212bb8bf8121

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