Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5dab400d47f0de…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 05:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 215dc0fa3b6d672bc4a72bb19b4910e7 SHA-1: 6c9b7c3d96e29def102184e20e6b7695c4c6cd36 SHA-256: 7d5dab400d47f0de1e9a4a79dea3969ff28ef1a8a60f80ee3afa271f058fb06d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to various URLs, one of which is presented as a download for "windows loader 3.1". The presence of multiple compromised CMS upload links and disposable hosting suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL analysis strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://www.igescanada.com/ckfinder/userfiles/files/xipibodexefivivivelubo.pdf In PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/34784871392.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/xogufivasewuxafajas.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/nimowetenon.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/bazanib.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134d9fc32b15---2952582849.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/84571147419.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/zizedipoxikajufoxesogewep.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/34655007833.pdfIn PDF document text
    • https://webhosting4.net/media/file/83430395835.pdfIn PDF document text
    • http://schokozentrale.de/idata/zesevamonaxanupedukagut.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/wulijagoka.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/72005714306.pdfIn PDF document text
    • http://newworldss.com/uploads/file/nuraxefaguwojaxut.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/34163146975.pdfIn PDF document text
    • https://tepatsasaran.com/contents/files/10022404960.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131802948e5f---tisuwegi.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/tixopomiwukekirur.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/27273712269.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/jatujosowosodosuwoner.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/34191807454.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef37fd0ec5---10329396581.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/tomaz.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/ravibumapefu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=windows+loader+3.1+downloadPDF 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_off0000d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D3 16524 bytes
SHA-256: 1719955479f379e3a74307a6ef27046f46af788e9c89b00e4eea7b3298efd65e
font_01_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 10512 bytes
SHA-256: 5e57acacb97197d89107e23517543ea2e21b8f857a2553d334fcc74ac5324541
font_02_sfnt_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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