Malicious PDF — malware analysis report

Static analysis result for SHA-256 679cceb018bdddfb…

MALICIOUS

PDF

78.3 KB Created: 2021-09-16 02:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 79b27ee2c993e84a6874e84a17e3a677 SHA-1: 6022f15ba3edee8ed76ea3f4ced082a166772474 SHA-256: 679cceb018bdddfb2003c31be3cde83cee3881ae247a77714ee04c1094dc911f
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads and disposable domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3293

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://weborder.cloud/userfiles/file///8985890215.pdf In PDF document text
    • http://jaqalsports.com/files/file/samaganag.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b3254996ffab66dc8249304293ba6a62/turalamumuxa.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/gifidomivomuw.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b32f71928c---66140585475.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/acpjk8ceveri6tqme36lo20b8k/renamefafufidizigo.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161427cb5f17e1---6159402412.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/42441559225.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/au6pfoorrcua6a1nksch1108sn/nogimupenazipumakifo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/93928775139.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/rovukilejetafef.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/bevafaro.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/18180454006.pdfIn PDF document text
    • http://dkstores.gr/userfiles/file/96665900336.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/koluxunavosil.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/tunalerurizumafed.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/22824856083.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/44373230962.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/73320540763.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/9424819082.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/fomokebetuvidinu.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/614266c44eaf0.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/jixojezom.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/xudatutav.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/zedufazejalisawanijatago.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/kasesul.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/63890218081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=redmi+4x+best+romPDF 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_off0000e256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE256 10464 bytes
SHA-256: 299d33e144755ff6af9af88fa66ad09191debf20abbc60ad8a6fdaa616c2d6ba
font_01_sfnt_off0000fa24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 18580 bytes
SHA-256: 8555f397b7548285adb08dbb9e6f81e9ab1d2db719ca02c2abaef31912fafc1a