Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e39b70a7d05b87d…

MALICIOUS

PDF

63.2 KB Created: 2021-09-19 06:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5c9cdbb6400516f2cdea6510414dae4e SHA-1: 2c54d90cd47bd46d566d46ce78ccaa79a7882adb SHA-256: 5e39b70a7d05b87d77f5dcc0af4c2b90e93f42fa3f677d69f945e96848f4d3ba
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains or compromised CMS platforms, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

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 https://medvor.ru/uplcv?utm_term=videobuddy+app+movie+download PDF link annotation
    • http://loadcell.vn/Images_upload/files/nufejowalonil.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/midipetasap.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/36820387635.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/fakutopojoxoloveset.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/jugovosuvarufetiwi.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/gorubugasemefazoduwefataf.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/32636341751.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/73652701367.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331a594e0d0---zejarewonijizurujap.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/rijawukemaxapoxojina.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/9bnoo5lshtrjbguoi61v4ftbam/simabarewawiwopabezubawak.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/98201950679.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/xinezi.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/34625693271.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/nb0i9n58phkvg6t7bnp5dda1ms/polofogo.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/b054c77b6a5dece65e1fa7e621557903/71765703995.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/86382300381.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/supowisunotexolapoxodiwof.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/49549528638.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/togozavetekusa.pdfIn PDF document text
    • http://chinalabware.es/d/files/70228325623.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/zefegaxilebudajuwef.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/10332703600.pdfIn PDF document text
    • 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_off0000b1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 10660 bytes
SHA-256: d891ad73cbe55b053a2067ac57741edd1a327de18f3df4f799fd54335c752c64

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