Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece0e484913e9d47…

MALICIOUS

PDF

81.5 KB Created: 2021-09-02 13:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d597a414e42bb26e6b8ee9e16535827 SHA-1: 1c8eb1db6ac0433998ec97b3bd72e889591e7f69 SHA-256: ece0e484913e9d476f43d4541b884eca8c7a5d139e38a07ba9eec609d12b7e68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads. No scripts were extracted, but the overall structure indicates a malicious intent to redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16088244160899---legibozegexupa.pdf In PDF document text
    • https://somogyplusz.hu/files/kugojebuxuzonemerered.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/faxobuku.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/ganodoratimerepamu.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/44504541614.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/26471512969.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/24610321406.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/80384059344.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160956151c038c---piwezunixu.pdfIn PDF document text
    • http://lumieretvie.com/userfiles/file/92449269659.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/5424914715.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/tobuferex.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096277ee334d---28450454597.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f072300ae---81250733682.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/13276820755.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/pupalaseradinivewusulimu.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a00fca93978---42327625135.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b74655994fa---pupuxaluzotigozapetolovap.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/62896692036.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16087506b5f5e9---kenijumuzow.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab718843cc9---kimuledoradimupoxukokalub.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/15254502478.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920de40d29c---jopolejorewerodofakobube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=new+baby+shopping+list+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_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 16948 bytes
SHA-256: 269a7ff185c2aa5cf8dc0ee3086d0d6d166d68833c7571459e080a6da804d4ed
font_01_sfnt_off000107c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C7 10992 bytes
SHA-256: 6004e9fddd6174e3be52e1279189dac7707712b36f66271208f2451d11fbe1c6
font_02_sfnt_off000120f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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