Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9a08f2f22e114c…

MALICIOUS

PDF

78.5 KB Created: 2021-09-20 04:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ae23f2b0a58b4eb4bd0dabf28e50b527 SHA-1: 800f328fb8ab845fbef4c001a2712b05b6663437 SHA-256: 9b9a08f2f22e114c1ffc36bfff1cce9e5b3eb61dda28962a42ed4a14ea49fe74
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on potentially compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is used to distribute or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://crescentcarpets.com/userfiles/file/jebilajutoludawidum.pdf In PDF document text
    • http://wksx.top/images/userfiles/file/varatatexabef.pdfIn PDF document text
    • http://suarezbeltran.com/aym_images/files/9983729956.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/80190937809.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/bodafinewabosofetoledot.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/pimuwejululelamukinunam.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/xedezevitivepawojufevi.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/sarutinorujosesobivo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/49539562703.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/53892578593.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/40618875455.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/28900811513.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bfb9e7dda02596decb9f28eed0ae8459/75216939549.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0e9246dc0659ae1613ff55f86e41501/37522582146.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/66545821382.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161387002c7de2---17276766285.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/62281466322.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/27049358778.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/2638731187.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/vagafetiraf.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/61283310868.pdfIn PDF document text
    • http://jawarakreasi.com/file/76315391007.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/161420e0e01477---wibutakijetupere.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pet+2021+sample+test+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_off0000cfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDC 16972 bytes
SHA-256: 51c3da6359ac407e0f632a786fe697047a758d49225cc3a7c4fe04a6916095fc
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 10536 bytes
SHA-256: 311c84f70e5cda24ef51cb3a20b06a7a335d868373af219e469ad7d5b0632e4b
font_02_sfnt_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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