Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0eb4a112792304…

MALICIOUS

PDF

79.0 KB Created: 2021-07-20 15:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fced880d6e33eecf6e10444933ef9cb5 SHA-1: fb4e1d6891558c524052394050996cd2778c079d SHA-256: ce0eb4a112792304b7188b364939dbd8e76fa1bfd68139251dae323fca6e750f
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or disposable hosting domains. The ClamAV detection and heuristic firings indicate this PDF is designed to act as a link farm, likely to lure users to phishing sites or download further malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tfh-filter.hu/_user/file/gimozugux.pdf In PDF document text
    • http://sgd42.ru/userfiles/file/30664851428.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/79228405911.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/wogusomewavove.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/80808757644.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8tco0qkd5q66rnmap4m55emq01/zevirerasuwumofolefolof.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/s7c2danmnd0bohdgput9orgm4h/gedogilifu.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/67175656515.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/lasisavojun.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210627200031.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/1690897765.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/96464927842.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608815ed938b4---rilenevimizat.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607967f195c34---tuwezubobojomapudak.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099b7ca09647---rokiwitib.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2ab31dc2d7d79fa6388a675948286580/174613604.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/gosebogafovazepodefu.pdfIn PDF document text
    • https://abeess.com/userfiles/file/75787816011.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0049cc890---bibasunoniruwuz.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5c17c2c6afd4b40d87c3de29767f9253/45641641414.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717021b4fba---zabovebawuliju.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa08fe4204---85692367688.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/4531700694.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=driver+media+player+windows+7PDF 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_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 17604 bytes
SHA-256: af8213d94673175a29111f1065bf3e445b0df8bbf8e590d47f444736045ca6be

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