Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae24df4fc1ee2a1…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 21:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fb521c37dcff29194664509ab59b68b6 SHA-1: fc54ca12dfad59663e37046d58b3b7be950f6e2d SHA-256: 3ae24df4fc1ee2a162678557c82fa0c518de240b2ef5afbbc0e1cf406e895f76
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://flynewsletter.com/uploads/file/sijozekefaratovifeja.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5d0a3fb4---voritekivowofikugeko.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/suvufonabavapizewitab.pdfIn PDF document text
    • https://gangnampools.com/contents//files/46731443425.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/f9dfa0b829a4b6cdc1f885269a63c81e/72134106300.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985cf9c884e---ketonala.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16102fde3b7c84---97609721484.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ff931bd83a1e1ebc00e6b91104ef50f5/89248074574.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/37935245210.pdfIn PDF document text
    • http://kotolantopeni.cz/file/96916684154.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210621/file/16242548692127.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/10980557701.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/teputaxame.pdfIn PDF document text
    • http://xn--80aafmoni2biho.xn--p1ai/admin/ckfinder/userfiles/files/18066572233.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/64593928089.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/ivk8lvvgjhiinuiq2pf6rgna1j/dapojekitakob.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/banasadakoka.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/61df9137dc4043e6232bfafcc5b01416/sakodesamobagil.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/kopevujopew.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/196800f6ce0f03f4293f5e2cf472e482/79853763271.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/62254742591.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/40558526570.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=axial+flux+permanent+magnet+generator+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 19128 bytes
SHA-256: e4d3e2f35b4fc01b74eb74281c5110e50ce24358e1d4d8c4650f2eeb3524c4ea
font_02_sfnt_off00013124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13124 10856 bytes
SHA-256: 0b0eece4b5599ae8444a5044ba497aeb23d603f3158a0ff9d7d08f1eeebd36fa

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