Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4102cf9a2344ea…

MALICIOUS

PDF

83.6 KB Created: 2021-07-04 05:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 92a86010e550db091a1aef90718aa925 SHA-1: 91a9141766f4d9986902e0cf24c0a5334ccd902b SHA-256: 3e4102cf9a2344eadea3924d1edb44a8f142f6b19c7a310a4c28a116531856de
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://thicongdiennuocmiennam.com/uploads/files/juwizobaxuzi.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aa087bbd9c15155f3ad96b6c5d1fc019/41543785358.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/l8mkemt0j57lqbt987n36g6ge3/20312189569.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2617cacd---sofogikifetapa.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607814b3be124---madezolukowewafelusaj.pdf
    • http://fairview58.org/clients/b/b5/b5cf5456a34e3fefef15e35162a7177a/File/2099560302.pdf
    • http://kursadowicz.pl/Upload/file/58406943252.pdf
    • http://mdc.ir/ckfinder/userfiles/files/9344250377.pdf
    • https://andhimazhai.com/images/files/73190468412.pdf
    • http://lamgi.pl/ckfinder/userfiles/files/gavumi.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e33de9798---xuxepudubijasusomokedol.pdf
    • http://daiichilogistics.com/uploads/news_file/rikofukibiv.pdf
    • https://nanyangtextile.com/userfiles/file/nelozevuwabukesadefun.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4457087a6---36353305864.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/dakivetamedanawalajeva.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/lobolufukonenamojajokar.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3928fde0e1---xibalegijeferareba.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094132f26eea---fatifivi.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ad032b1e2---wizifelijibokosezepowavi.pdf
    • https://hunde-katzen.at/soubory/teremobakejotot.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/uthld8usc7urnhle52jga6g7a5/rideduxaxineteloxujis.pdf
    • http://transfertrolley.cn/d/files/83525331398.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=find+the+number+of+sides+of+a+polygon+whose+each+exterior+angle+is+45
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE2 16792 bytes
font_01_sfnt_off0000f4f9.bin
6a2084817d8357d76c56b4fe0e75ec5ef6cc7112a1b45a6c335df5d28ad72bea
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 11800 bytes
font_02_sfnt_off000110af.bin
c9c2a9fb4f3643b5e7ec6465dbe7d2e7ab6b56b3f0e942696036134f8bdc5587
pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 17756 bytes