Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20c657c411b2859…

MALICIOUS

PDF

89.9 KB Created: 2021-07-27 10:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77f07d59e107e80285a227661cdd8001 SHA-1: fe9b0c40d1d68d6a3c73322491135995c28916b8 SHA-256: d20c657c411b28598eb467ddb96947ae49aab2a723df1dacb49e1a989c75a5e1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a download button lure reinforces the malicious intent of directing users to download potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/nulazubopoz.pdf
    • http://malopolskiszlakwinny.pl/upload/File/67366329111.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd04621437---mokukawitivomagijadixeb.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ac12d727c---7177011108.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/d159e79b8ba62af1e8685230a47e8153/64510374351.pdf
    • http://ronaldtan.nl/images/photo/86709093583.pdf
    • http://foodsafebox.com/ckfinder/userfiles/files/65863048794.pdf
    • http://www.pranabkumar.com/fckimages/file/42556284537.pdf
    • http://griesvoegwerken.nl/UserFiles/file/tibojeludo.pdf
    • http://mamaskitchenorder.com/uploads/files/miruj.pdf
    • http://cafegreenwichvillage.com/uploads/files/morakinidi.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ab399ee0d---javobatenarutanafigid.pdf
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/sorixujow.pdf
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/76222055755.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073298715596---68562035698.pdf
    • http://cnmrobotics.com/files/files/butakegujofego.pdf
    • http://usdcp.jp/user_data/userfiles/files/kosidokusefitef.pdf
    • http://rickgrisolia.com/userfiles/files/64273652986.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/48109738194.pdf
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/guvalofupu.pdf
    • http://12shio5.com/contents//files/lemepexasaxajuwepetakote.pdf
    • https://equantumconsulting.com/files/files/mivujuvakipam.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/la8gamj1r2lku715iqnneviuj4/marexagujumovirerovi.pdf
    • http://ebbers-schilderwerken.nl/uploads/files/porivebikizos.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608291a052de2---zajorubegaxafa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=mp3+free+music+downloader+for+iphone
    • 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_off0000f5dc.bin
132855558dad7abb391599e6bea803eafa186a6462b827108a6d83dacf0f9d25
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 17964 bytes
font_01_sfnt_off0001255f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 16792 bytes
font_02_sfnt_off00013d76.bin
db5bb592b3b25d1618e69ab711fd528fa3dfd50abbb93da8b5dd9a0dafee95c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 11140 bytes