Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bce4f625cccad41…

MALICIOUS

PDF

78.1 KB Created: 2021-08-04 12:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 798a8099ac2915b3cb288c7cb627ed93 SHA-1: 8e0fdcd65670fe6740e86d02e337d560a9d5a074 SHA-256: 8bce4f625cccad415aa4f00464a7ccbf3e425e69bbe868104e45327c0bbf04de
154 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 phishing or trojan payload. It contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and link farm nature strongly suggest it's intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7431

Heuristics 5

  • 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
  • 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://jfhcoaching.com/userfiles/files/10957480246.pdf In PDF document text
    • https://prtl.pl/userfiles/file/50530784051.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/82588920299.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f60e507313---natazawuvefubomuxaxoja.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/jamomanoxamomuniboxuxiga.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd610d0485b---gesudazitob.pdfIn PDF document text
    • https://ebdaatcoop.com/userfiles/files/kuvomufafekapurigivi.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/04199c66cd267ad0fac2c1250218a4f9/21014110653.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160dd73b2b4fa4---godetemewozajakuxuj.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/a4da48c4d437ba2747c2bd3932f7b69c/xixijesijobojo.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///kelon.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/mofepidam.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/12471888946.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/xuxizorudaliwipu.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0a2e1d2f62b569c2baaa9e27455b38a3/90073675062.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d208999a8d9---tuzekak.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/58528829254.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104359562ba4---pogepis.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/decafbbd4b2818179b38b884e422dccf/91960312573.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160aab1603dc8b---35403071538.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/c20273560598ee6489e974c5e94d2402/toperutilevekapa.pdfIn PDF document text
    • http://17njl.com/userfiles/files/roletuzil.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/zomomuwuruwuj.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/46292303560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=does+japan+netflix+have+naruto+shippudenPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 10996 bytes
SHA-256: 4a422a2db2e820444786d33563f859ae88e529dd93e5a0c2a692400751e53b0d