Malicious PDF — malware analysis report

Static analysis result for SHA-256 287008d915c78c53…

MALICIOUS

PDF

75.2 KB Created: 2021-06-23 04:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bd4761a9e7e1086b134d22f7d7dae471 SHA-1: e8ccb62db1f89f7ac9c9248e0f16e0c1c8d9bdbf SHA-256: 287008d915c78c537095b10f04228b76d90a9b759dd4bbf55a0cdf7d47b35c4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs hosted on compromised websites, likely to facilitate further malicious activity or phishing. The document's content and structure suggest an attempt to disguise malicious links under the guise of a leadership definition PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=transformational+leadership+definition+pdf PDF link annotation
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fcef37b09f993e4a08cf1573aa9559f6/tixunuwojibabaximevuw.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160770fe85e7da---guteruritejadevomu.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jutajufuzowekaf.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e0350a10e18cc87f559ce3120832964a/wapafajamemijuvoniseve.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/5839689c9c9c061dbc5bc84c1eaa9745/29545463166.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/lomidasawu.pdfIn PDF document text
    • http://laetitiabernard.fr/images/file/73405951041.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104290425176694.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/96549041512.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/i7jlirsrq6kiorv3656un2adff/vewitogerosesiva.pdfIn PDF document text
    • http://naucseto.cz/storage/77395910016.pdfIn PDF document text
    • http://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/basaridakabebizarerav.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210510035318.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/80257836424.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jokegopewibizor.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/isonktpo0bfrphoigl0go9r8i8/befakajizojek.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/584d8ba58970a99c95fc88a77ccb07c0/vilelowe.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3f7e9b36---827501041.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 5016 bytes
SHA-256: 532d2f510424ef4f310ffc73e82512c063a036467bd2936ee1ded65283c632c9
font_01_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 10252 bytes
SHA-256: 777e2e144c8bdc744a057369e98f1d0d8dcd843342fb3d83a67b1d5ad9d7fa10
font_02_sfnt_off00011199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11199 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378