Malicious PDF — malware analysis report

Static analysis result for SHA-256 e085eeb45dcef62a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-04 17:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: d4ab7566e3341b45db2ba1c7de1bdeb8 SHA-1: 585e73eb6f5d8b1117b2ef2eeb5c7aa56820051b SHA-256: e085eeb45dcef62a0b09375eec6b0016c5ffa3e454b926db7e5aace3004c34d2
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://kvzriu.org/images/file/5919267393.pdf In PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/76610498948.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff20c328c1---venilutuzutavuvipek.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/28976947660.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/6339334643.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c95fb27a2---48429171278.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/disoxabekod.pdfIn PDF document text
    • http://chpcentre.com/files/file/88663489744.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160836ff084892---nojixeka.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f95e25e12f---8470867615.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/powamoj.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/6144067855.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/39802788354.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/vajeno.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110eefd1386c---xidosozapu.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/po1vfgre7144l1sk24laedku22/kijupazafodufijudigoseva.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f04d2797e---31045928687.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/wefalejofudifakixomuzufam.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b14394ae2---ziriv.pdfIn PDF document text
    • http://beliangka.com/contents//files/sobiwefadukutobelenuz.pdfIn PDF document text
    • https://x-software.cz/data/file/65774970207.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/sjfbcb912764drllp007r520c6/lutumovijesenizalanuk.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/gilosalat.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/23255788537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=neurofibromatose+tipos+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_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF598 10728 bytes
SHA-256: e9ff820684268471bd9158c7eb9994f95f1b8036a42242451a7527aaf0f18829
font_02_sfnt_off00010e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0C 20388 bytes
SHA-256: 1e3caad8ce59f98f49c5a1ff4f7f76261f9c8de064afd47c24c92a35a7b9f4a3