Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee6cc60e9c4e351…

MALICIOUS

PDF

82.2 KB Created: 2021-07-27 19:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1cecb22121effc7a86bc803d6fe5aab SHA-1: 9d187410c53572086e83832b1b36c976846d82da SHA-256: 6ee6cc60e9c4e35130a74969770d4e252bdaa9139b173c5c604e303d25683e8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a likely intent to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/cc01d360ac3231a48fe5b1a7e63e6284/wuxusidikelamaxodov.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/eooit8gd1c9f5gqh5oshif5r9m/roninorenijidaxanizituwu.pdf
    • http://scpt.it/userfiles/files/58255169513.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/suss90pt7it48g52b31jimn7cl/jepoxipazogoma.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/5bkp4d7jbs2kfjq3scbnlk68rv/17835384354.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988c1e33a68---13564133660.pdf
    • http://rentbucharest.net/images/userfiles/37801847933.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ec37cb15b---12126905243.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/34630823317.pdf
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/pivemimesuxos.pdf
    • http://cortabellanews.com/userimages/pekagapanejipuzobabipok.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a649ea01dac---36910380242.pdf
    • https://xanbiente.de/userfiles/file/43239554398.pdf
    • http://cartonwrappingmachine.com/userfiles/file/wukaxipeg.pdf
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/sesetakinotofimogolu.pdf
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kejigeg.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90ce5df69a---96439269360.pdf
    • https://condominiovillage.com/userfiles/file/kufofemato.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ojmg91j573mc0vjrrkn0gbq8g4/gegasomomikilu.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074793d00536---detosuxusa.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608210444ec24---74777775648.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa605f9d52e---51540516386.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/1ff6d3251c1c0c552977941a0ab1da59/bogowapesibapirexuwa.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9cf2bf3cb---69156514964.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/38ff4c4830d33e27fdd9017a5c322cc3/86685819626.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/0kmfct258pvf61v7e5bnrvt8be/94250717383.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=libro+de+algebra+de+aurelio+baldor
    • 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_off0000dda3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 16792 bytes
font_01_sfnt_off0000f5b5.bin
741f10ed7853df7c2340d61f89c67956b25ce17a83c623ee7d774b8c83c49636
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 18436 bytes
font_02_sfnt_off000123f9.bin
00ff4bcef0a1cc66f227125dc4060ebc1da97d6db17cdae8fbd976f16cd8b966
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F9 10248 bytes