Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e95eac3290df866…

MALICIOUS

PDF

89.5 KB Created: 2021-09-07 02:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d116b203ad83cad83679c69d521d707 SHA-1: 38b525db31cb134811082b2203a9fb13fda044c9 SHA-256: 3e95eac3290df866b8cd1f1565bd379a6ab0e4185563e471b683f2be9cdec94c
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and link farm heuristics indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/15332a4c1a2744c4349c7752a43a75a7/golip.pdf In PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/10d8e38df536f600e43991bfedcfbe50/41105019872.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/f3f517272d479030d51976cd0c0c1639/gukixurune.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98d823297---zutigumowovoz.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160766eff6d2f3---70451664379.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/002e5a4bebfc70c0bd318541db098e0d/bedubudiw.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d673874c994---21502036102.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/fb5cad933831e6432908828de5960af7/70507234811.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mhunvqv3e7vn6k97cbup9dfg80/pimam.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/42141786256.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210822_D970C2B1B5D104E2.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/45909780827.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21b8260717---norazovewanujaxedabodezu.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/r86bdio060a87asjtakk9prk27/lolajowex.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/5gso1t4smuio6guhjs31v39927/masefudaf.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/nagadovabobunuzaw.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/76515784552.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/87c2be63768e094acbc3a203c7aaaea7/zigixanevara.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/94781306782.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/fetorafebuzivesixedeki.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/73238797831.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab34876958a---11147512369.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/33933123616.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ifb2fjqg0g00mjd1fd1r61l15g/592276818.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/95832017252.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=chivalry+of+a+failed+knight+volume+9+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_off0000eb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 22456 bytes
SHA-256: 781155ad63eac774bc0cff90de7efe5eb5e1f47a6772fe129606662ed25ba21b
font_02_sfnt_off00013d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8C 11348 bytes
SHA-256: e0e34caba193b8e6326d40a5fbe91f32b9647b3c84e6b3f00609c7c90104a48e