Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d80f1eb1294272a…

MALICIOUS

PDF

78.1 KB Created: 2021-09-09 00:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7cc4fee3fe6e2f08d0d5722def7a28f9 SHA-1: 5ffe5ad66b2a3363f2c55e4308f0ef5af19f4240 SHA-256: 0d80f1eb1294272a986a5abfdfa38b54d68a4c4e1a5822dc33d9fbbbbefa6823
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to other PDF files hosted on various websites, many of which appear to be compromised or disposable. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the presence of 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' from ClamAV strongly suggests a phishing or trojan distribution intent. The document body is heavily obfuscated, preventing a clear understanding of its direct lure, but the overall structure points to a malicious link farm designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7431

Heuristics 5

  • 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
  • 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://gerocuki.hu/user/file/wapasejupi.pdf In PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/nexonidamaliposajos.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/96740378950.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161332ce6c26fc---sisagoboge.pdfIn PDF document text
    • http://checopharma.com/upload/files/50529742406.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/guremiwepusukunid.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/puxabugurepala.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/mugufofejekoga.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/52814067432.pdfIn PDF document text
    • https://proia.bg/userfiles/file/nigig.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/monavekizofo.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/77862044591.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/89037154526.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/4320136499.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/161392867885f0---pavivugofaxuwakiralej.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/xarek.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/48415669968.pdfIn PDF document text
    • http://sunway.me/ROOT_PATHuploads/file/050241015414.pdfIn PDF document text
    • http://kag.fr/userfiles/file/gurarakagakajexa.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/21b1287a1a684fa1490d50577b9e1eef/15528251013.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/67288344660.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/bemano.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fe0a1f6d6---defaxozeza.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/demuzasalonik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=quran+premium+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27F 21376 bytes
SHA-256: a4d7d42e26f7a741a768bf5e8c6795f84de367c2cc99da2dee0745420b6093d8
font_01_sfnt_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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