Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c18a08e1f7299ee…

MALICIOUS

PDF

71.7 KB Created: 2021-09-03 14:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 430e83582e27efba79adb0986ddac03e SHA-1: f7a6031f9b1b3a615b58b21c30ba9f8ddeab09ba SHA-256: 7c18a08e1f7299ee00121ea670a7cb66566ef3012de4faf81e4abbb256430381
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many embedded URLs pointing to compromised websites or disposable domains. This suggests the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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://laborke.ru/uplcv?utm_term=club+car+carryall+100+service+manual PDF link annotation
    • https://darshanam.com/ckfinder/userfiles/files/81648560443.pdfIn PDF document text
    • http://foodchemsino.com/d/files/dezulaxudepogova.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/log9v9lbopcbqiuobcgvjvg9q5/50059477062.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129e5afcc95a---tepasitosav.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xibutuworomofivufumide.pdfIn PDF document text
    • https://memoservicesrl.it/file/nenatuvopadu.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/64825735335.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/nogeges.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/88785759836.pdfIn PDF document text
    • http://wenxuezj.com/images/File/melapobekepagozoxevoler.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/xajoxowuzemukuwukilekep.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/zemuzijezisikirumasixo.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/33202092254.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/add4d0upfqo1k2kc25vc445pk8/3096494091.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085159fc1659---46013309692.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/pugurafigapol.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/q3vs8t2tnrsnqu87dectdqq6p4/lovumodivaz.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1608eef6412c9e---pudotosijudoz.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/saboke.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/03add0898ca786ee49e18bc9efe706a3/vegewomaketuvuz.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/22858313261.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 18920 bytes
SHA-256: a9e661a5f7be2f873a5dc53294c1d17be22e07814fda96bc4c98a2b9666ea710

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