Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1dcc7f7522602b…

MALICIOUS

PDF

76.7 KB Created: 2021-09-04 02:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 16991ce7d52835c520bafc7c184b06f1 SHA-1: 3c5a43dfa53207e5da2a0cb93778374d3e69bc5b SHA-256: 5f1dcc7f7522602b69f9d50202c9c84e5a82c1214f4d68d8ed1e108323032ae4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to host malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a common phishing or malware delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/5o0hph00i54k6guf8batiic4q6/riwigarusepemuxidego.pdf In PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/7568a8caf969aed8a23c1d78931754d8/zoxijexanemidek.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/041253536914.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/puzenex.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/26894625710.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/xumuwefajalopurezoxozubel.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/kunesig.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/99286587622.pdfIn PDF document text
    • https://megalightgroup.lv/uploads/files/tilibim.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd6079f2e9---divezimibobaxoxuj.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/videbibekifofifejeleju.pdfIn PDF document text
    • http://ray-king67reunion.com/clients/41562/File/kefuvitupewegut.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/32019250160.pdfIn PDF document text
    • http://m2m2design.com/userfiles/lakojuxo.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d223316d5f329b0425eda73d9a2efd85/depoxitomewojivukos.pdfIn PDF document text
    • http://zubrcup.by/files/files/88328957679.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/7135735903d6545d53b32c22ddb0c04b/20838801803.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/84090686980.pdfIn PDF document text
    • http://saint-party.com/media/file/tubulolanujolelepik.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16112f0bc63595---didanuxularulonom.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/mojanurozopixese.pdfIn PDF document text
    • http://anitt.in/ckfinder/userfiles/files/28664732504.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c31734e5a83---fakarolepukajefeludaz.pdfIn PDF document text
    • http://standardamulet.com/files/files/mafikagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=ubiquiti+airmax+nanostation+m2+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C1 19000 bytes
SHA-256: 571bac3892b805c194a7fb0adca8df32c58d97b59f57ea402a1db1271d40472c
font_01_sfnt_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 11096 bytes
SHA-256: 95b5d8c6766468da0d960d6556f5c35c08b1edc2b730d93d14bc17a0841b57ec
font_02_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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