Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ede162ab0395b9d…

MALICIOUS

PDF

78.5 KB Created: 2021-07-21 18:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 89bd4e8cefa62004f493cb6af596a37e SHA-1: 894304f8537701780be1d1d9f94518dcb7c56d79 SHA-256: 7ede162ab0395b9d4a412bcae1ca9a7ed64ed61399fdaa34a0b2678bd93315b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of multiple PDF link farm indicators reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://novussiteyonetimi.com/uploads/file/wamufirodeju.pdf In PDF document text
    • http://art-lan.ru/uploads/assets/file/74181893857.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/16128870178.pdfIn PDF document text
    • http://khochailo.com/upload/ck/files/nafefikus.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/16779077882.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160745ed9874af---povetixumixutubetuze.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/lerobawukufazasajama.pdfIn PDF document text
    • https://vestol.bg/files/file/vujakezamasedidi.pdfIn PDF document text
    • https://ubranni.com/uploader/files/wasodibavogebinomugir.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcf2c4afd4---7803306535.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/jezutosinikisabijanot.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/runul.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/21n7s8hluo8bhvf9g6ikfcjhsu/29648056856.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/binijizomezosivej.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/v0ffr1opepeg17eo5oqop0vgt2/ravogasefabelanafu.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/vuvadabubitiwawukoximipo.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23655388561.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/nulakafagezododuxevebow.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/70086820649.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/sopofawapup.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd19c2aa228---mulunevimitebudimumeboj.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160991179613ea---pupuk.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4e470063ca53818ce6fefc24eb8175a7/14175454826.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tale+of+nine+tailed+streamingPDF 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_off0000d01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 16516 bytes
SHA-256: a8650d462593f9e8b88f9999c8bce0f144ce466def1a50ea3b9bab2098230250
font_02_sfnt_off0001130c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130C 10660 bytes
SHA-256: 35ef85bfc8f3b6e694b880e3c29fa3c10c39b044cc78d94eb7fcdf9c1c741d70

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