Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5a48485cedbe67…

MALICIOUS

PDF

76.2 KB Created: 2021-09-22 19:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 48d40ccfdb4bc5702b0323d98d96fc5a SHA-1: e5b2cdc38585ad553d88e35afe215be29e982033 SHA-256: ee5a48485cedbe6797adeb16f865f20f2b02832df30d2e082c1e788d94533b5c
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5296

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://levne-pohary.cz/UserFiles/File/javixelafab.pdf In PDF document text
    • https://isosklo.cz/uploads/pifugibonewejogi.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/cb4ceac2a80fee8f794f06780d9a4bb1/mafajujubogasasidobu.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/bafewabiwiti.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/wusadopezixed.pdfIn PDF document text
    • https://isgz.me/userfiles/file/sipujutex.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/tanomijowuwutikatix.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614370d418f8c---torod.pdfIn PDF document text
    • http://adfaveo.com/image/files/20210917_162809.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/87cdfced3c5df119adf6ede1f148c0b8/xikavisukojovixaxakuseto.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/mozuzegefawijekapolepa.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/85377732228.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/39594398223.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cd7a06956---33862482455.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/22564920987.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/79467529158.pdfIn PDF document text
    • https://avflash.nl/upload/files/wuzenuzuwejejurel.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/jafozegawosoz.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/16744957316.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/9e3d466e3033a30138aebe7210f7885e/mowejis.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/3862795675.pdfIn PDF document text
    • http://vpsystem.com/files/fck/78020357415.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f10f7ec62e5183676d6dbacddef2bed8/69324005692.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/musotadi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+call+someone+without+showing+your+number+androidPDF link annotation
    • 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_off0000d9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F4 11248 bytes
SHA-256: 6fb169938d36daa9d39b0cc116929135581772765163f6ce76e018bd4ab1ae65
font_01_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C00 16772 bytes
SHA-256: 41cb356f27ce50a49778229d841f47cf963b48e99632ad35dfccd3a3d12cc25d