Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e215154f1ce67ff…

MALICIOUS

PDF

96.8 KB Created: 2021-09-07 13:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 110442756d482e91b2a1a3ec7a78e518 SHA-1: 39050ca7a5bb5bb283393440799a65c0b46c0e17 SHA-256: 0e215154f1ce67ff6fb334a2d7ecaafc1405f7f678c4e55018babd3b4073c33f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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 http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081afadc4c5f---lebedebolowokavalopude.pdf In PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210727225301189.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/30240071937.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/pazezomibepipeselexikel.pdfIn PDF document text
    • http://omni-links.com/images/blog//file/vusuxuwutefij.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acf6fd37b5---zosojumowazopazofovejuzex.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739ceb9ad3c---dufoj.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/85988536084.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/91726745544.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/sf57cp3vgfl0v92skm5qflh022/kitubawatavudokumaxuk.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/rerenekopi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612c46941cb2c---70818015767.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/433738486.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/51659150291.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/23148247613.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/096sfvvvooqpj7dk875i3n13cv/rogax.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/resoriguwolavefafojosoji.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/9202470301.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/vijibuzupot.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210602155412.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/14966695096.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ff525ccd6---debumax.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2a39c1dec08aeae9ff813e48077723d6/fikagobapazufu.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/zanurub.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fa956a5264c4cc0d09c10b95df578cc0/95386185185.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/93233319491.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=prvi+svetski+rat+srbija+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_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 10652 bytes
SHA-256: e9d22ba6b18ac8feaa22daf9854aba697ed0450d5202ed8368974f0dc82c78fc
font_01_sfnt_off0001269e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269E 21256 bytes
SHA-256: 0af30fc57e043ed0529610ab1b8b41d9dc241c4100ea3290612373b99fdeaf00
font_02_sfnt_off00015d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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