Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce59268e37d86ea7…

MALICIOUS

PDF

93.4 KB Created: 2021-06-26 23:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a42200925208dc024217b7d42923bea7 SHA-1: c0e497afd922736201deffef26729c352a0a0a03 SHA-256: ce59268e37d86ea7acb0a65f7a57761fc687f1abbdb5984b3383023554e1e0c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://infrive.ru/uplcv?utm_term=the+contract+lover+novel+free+read+online
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2fcceb9f---49286929017.pdf
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/kagowida.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/1mbi01g22rc158obblufvuf3i0/82234367320.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/99fb46abf231739dc2a9995126328ba4/jumanenojirolidadi.pdf
    • http://cp-tournament.org/ckfinder/userfiles/files/bakogituxak.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ef1110413---suxajopobulisogesuges.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac4754083---2339272513.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc87a0691a---15544515640.pdf
    • https://copab.tn/216mag.svn/uploads/files/vovokimibozaboxazulit.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/vq932h94um1gb12ka6vr914eob/49769458056.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oj1aq45bvve760cng38lt790q5/pikugoke.pdf
    • http://cathugo.de/res/wysiwyg/file/89131290088.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/756452c86aeb511301de2d954367cb23/31729028042.pdf
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/1014a1fa6a4de88cf7ce1ff57d96615d/xesagisamedoxupevov.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/bujawizufofawudofefadusej.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae127fa4e---tixinogot.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de07486bb3---zawusafiworubupuvore.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba20dcf10c9---jufubikujikavelogibepaz.pdf
    • http://championshipsportsrings.com/clients/23492/File/67027513364.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/12c90bfd21481291feec5c19acf5d331/bokexenek.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af42c139aa---6836207162.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/dd1dc0341eb228bbd795f406bf0c97aa/timipoxek.pdf
    • https://ekransamara.ru/files/6274101226.pdf
    • http://bioident.pl/photos_fck/file/85008126318.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/a95c77877323f1fe41506ee65daf9376/jasepudel.pdf
    • 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_off00010d37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 16792 bytes
font_01_sfnt_off0001254e.bin
e2481e4198327ff44c3ccffefbc9fbd39c012e707f9bf839a09e767f044f3b63
pdf-font-stream PDF embedded font (sfnt) at offset 0x1254E 10436 bytes
font_02_sfnt_off00013ce0.bin
c7caf099a151adc1198776df3a1dd1fe6550d27cb084a126136f0784691476ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE0 16700 bytes