Malicious PDF — malware analysis report

Static analysis result for SHA-256 004039e509123f6d…

MALICIOUS

PDF

76.1 KB Created: 2021-06-30 12:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6586779cc352b17fb534c14a71761e52 SHA-1: f34cb73b8c7f5ed7b420f6f95dd4f822ef9b872f SHA-256: 004039e509123f6dea946299d17884228d1eed462110d7f3e26444e16e2f9584
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. The heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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 https://bluza-shop.ru/content/File/68173787813.pdf In PDF document text
    • http://m2m2design.com/userfiles/60017594594.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769594be90e---27257543064.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5b516fb1317ff6e59aebc041c51d24e2/26102827316.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/tupaki.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/53736736045.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/85019259950.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/19155036318.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57fe8a10b---14930641725.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8cd07240---bubesijibibefe.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/5730dcbea4e32bf6a153bcf4bf46908c/toforabelewugogogu.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/q3lnn2nnncpoe0kfr7p26p2d16/kagera.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/37976548836.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/73076358116.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd987bff78---kojisiwutipijatok.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/lfrkd25fg0jvef6rok5enuf0f7/vuviw.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d59efc0efca66e89f60491748aac4768/80795639549.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/bogexinomilapekoj.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/93a30092290819a2df4247201219cb10/4740483852.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c12bd3f90---xemotezotivetizu.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088da6429583---91906292563.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=clash+of+clans+th11+war+attacksPDF link annotation
    • https://mediaget.com/userfiles/files/17487484633.pdfIn PDF document text
    • 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_off0000e4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B9 18956 bytes
SHA-256: ff5f1e58c3767e0f4c31e67055bbbc07c7a919f0cbf9eccb0015bcbcffc4bd13
font_01_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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