Malicious PDF — malware analysis report

Static analysis result for SHA-256 960f54485a37f6b4…

MALICIOUS

PDF

78.8 KB Created: 2021-09-04 23:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9c3b6debf184588e6ce4d11a19890266 SHA-1: a50fd4403f202bc2237c8bd45734167063cccf2f SHA-256: 960f54485a37f6b4fc40d02691b2fdccd01a362a15824d1dd4a33e391385acc6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct user-facing content but the structure and heuristics indicate a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://proxima-design.cz/files/file/31110386635.pdf In PDF document text
    • https://mcitalianwine.com/file/wademeterasaxexivaj.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/gaturepewurijo.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16082a72232f96---7643594846.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b8302282e29---32346100564.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/wodosofumepesupu.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3cf9261ba---19253173427.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e7566c140e---609974802.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3n6rb6g6243m5hikh9o1f5eokk/31280756390.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/8k6gefri65meef29lmkp0r3c6o/76886056095.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/1498934580.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/81998739899.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07a4c86f1---nokujaxotezaxotoloro.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/33134810278.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/guvutu.pdfIn PDF document text
    • http://faradbox.pl/files/file/51216764898.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/20965311120.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779374a41ba---10653567463.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6c7848e0---46505133763.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/b682aadb45739eefaf1a8e55233e2f6b/todoboxod.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/cf4cbec0d60f620ce98ff7a5b98e4d3a/fexut.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/6c35538205fd38f4d7f19559296c091b/45544273342.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/81549359704.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/dasikigagiba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=bushnell+yardage+pro+sport+450+user+manualPDF 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_off0000c627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC627 11348 bytes
SHA-256: 1b3b2e6fc8634ef91025c479205e0f7637f9ec4491ee37fb5ade4653cc3d5c10
font_01_sfnt_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 19524 bytes
SHA-256: 964297dc2d2c1898455971f07ad6cab46190d0835ce0486e02d5a2cf696d078b
font_02_sfnt_off0001137b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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