Malicious PDF — malware analysis report

Static analysis result for SHA-256 48629eedb99a7d34…

MALICIOUS

PDF

86.0 KB Created: 2021-09-07 08:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f846175ea5c269275e21a95c46d1f986 SHA-1: 8f53bacc7cf5a351fc8363075787266eebfa3d9f SHA-256: 48629eedb99a7d343ca31e7c8cf0164425e0fe392b6365364c405721ba6a57cd
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4c3d1d1e6eefaf02b03ded84f18e34b1/83777700359.pdf In PDF document text
    • http://mwflower.com/upimagesfile///vivutuzixinekalupebut.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/97632078398.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/dajuvebububuge.pdfIn PDF document text
    • https://ienter.bg/files/dukuto.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2895fc0d78---filedomedoromakaxojiwe.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/57119922444.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/38571284365.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/ginefi.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/bobefukefafutipase.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6761_20210515044809.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119d18515cb2---68992294502.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/2730d804b7c81cd401bfe492e8f694b0/81736905412.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/zulikapif.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/54693987862.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/39237922635.pdfIn PDF document text
    • http://changdahk.com/upload/18816893437.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/56334923414.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/be55a165ea901f481d0fa3a68e9cb997/88765206274.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/71375678119.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b35abda3b3---18394251150.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7c10a6a82---2507307219.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///fisono.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c40683c086---94166604984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=connective+tissue+diseases+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 17084 bytes
SHA-256: 37e3c776ba35e56f5307ed6d1755f0d2c775ee5675a41704b6aa5a6b081c3591
font_02_sfnt_off000131a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 10664 bytes
SHA-256: 1cdeed7a6be0edaead04bd4151a4853a15fd4480161d5eb13374ce3c33e0e104

Open this report in the interactive analyzer, or submit your own file for analysis.