Malicious PDF — malware analysis report

Static analysis result for SHA-256 145081bf8a68a6cd…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 11:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 73b4ab9253ac7743ecb67aabd9237fed SHA-1: bc3ed9304cd7c5d14ee0476a074de54d9fae9f63 SHA-256: 145081bf8a68a6cd00986b3119697a8db576ad858b62ed74310464b4878adfa7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document as a link farm on disposable hosting, suggesting its purpose is to redirect users to potentially harmful sites. The presence of multiple compromised CMS upload links further supports this. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7426

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://medvor.ru/uplcv?utm_term=vidmate+file+vidmate+file PDF link annotation
    • http://www.offshoreyachts.net/web_upload/editor/files/16942290753.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146c5f6e3b6e---24628003529.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/49099520472.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/25492631900.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/8739544339.pdfIn PDF document text
    • https://ximangcampha.vn/upload/files/76235125947.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/wamusazazipoleganuderoni.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16148601434062---pazorepura.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/83234395007.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/mifoseta.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sapuguromagulefujuz.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/cfb2c2172356ac73c0187041c1bac29e/kimakigurudiva.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58740172523.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/kmm2438cgmmn10tiv0tbr2n43m/rogejuseluvodob.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/93880580094.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/23661636469.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/fowezojavemir.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/dexax.pdfIn PDF document text
    • http://analhospital.net/file/files/wavigarizifuxudek.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16146ec0226714---vugir.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210903172319.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/69714004370.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/finegojutuxezidaxafekivo.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/98597347051.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AE 24588 bytes
SHA-256: a3b676748e94cc9fdfc18b4323702c9730a82bd758820cd2d99c0420d8cff189
font_01_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 10060 bytes
SHA-256: 0c54859b090195bcea19840864c57667fdfaf30249ba8d602d1f6ea7e1c41082

Open this report in the interactive analyzer, or submit your own file for analysis.