Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb8f95b8124fe86…

MALICIOUS

PDF

79.6 KB Created: 2021-09-07 13:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 67d6ce586cfd056950606c4c915ad28d SHA-1: c1b39baec0f810e0e033a771b540fceeb1a2283c SHA-256: 8bb8f95b8124fe861904c20b761472f6e981a3edcab72af9e8483d975a133815
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or serves as a phishing lure. The file contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

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://adice-area.com/pictures/files/tokawenat.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161164b010965f---31616740973.pdfIn PDF document text
    • http://nature-revive.org/files/file/42577116334.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3274b955bf4ea6cda7d622a17a46e3e2/96322489153.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/60300592335.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b683f2f78---65723395751.pdfIn PDF document text
    • http://ontsgoi.shop/uploads/files/ribuzibik.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/fererivezomu.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/34455769463.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848dff9771b---71551619805.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/t8fukrf9c6hk0qekfvmmrlthbp/gagakobukususogavoxezajev.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d3cee9453a---zurifosafafesamiw.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/8095772686.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/83084147319.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/be23bc073088cbb81fc26467ba76f481/96660980413.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/016d0f7ce8e2807e3516496016532258/gilonenusabamibibumebas.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/24652333346.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/1a0e365c1c4995f3b55c4d9a0b2689fd/kamago.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/gebinamizefeputalazas.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/418h86qobltvatocsj0pqlu9mb/25883371394.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/zaperag.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c85acfcb17d---46226526861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=passei+direto+download+pdfPDF 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_off0000e803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 10580 bytes
SHA-256: c4ce877ba5eceabcb9b2916fe299f55c849b4cb5ad3a8cee38345f4ed55aae33
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1