Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e484a53c7bead01…

MALICIOUS

PDF

85.9 KB Created: 2021-08-08 01:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01369955c9aae2c0e52aa9b46523c24a SHA-1: df4dd67157c1ece4e89dc0ed457e99c0a5e87418 SHA-256: 1e484a53c7bead01fb87ef259fa5ed7be5f41b33944ceaba3076cb4370fcdadf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation through compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/bef25a93756b3177ec6b61b24dd6cfc0/23271295619.pdf
    • https://deltagroup.bg/uploads/file/vebabizezasowun.pdf
    • http://phuquytravel.com/nguyenvanlinh/files/55794549780.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608492b5a306a---temokiki.pdf
    • http://www.yemany.com/yemfiles/files/69676635358.pdf
    • https://vildmarksjagt.dk/userfiles/file/15700710796.pdf
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vanuboxewe.pdf
    • http://madmojo.com/fckupload/file/dewadibumebarapugapob.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9ff4a909a---tekunileka.pdf
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/netiminadilafesexelux.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/b520bd030b038cc4164b624c1e75d4d8/60071088328.pdf
    • https://bulgariapools.com/contents//files/33740680110.pdf
    • http://artpolyclinic.com/file/files/juxowu.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b16e45355fc---724301230.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/25177807947.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92557267004.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/r9n5c8b4g14bd83m7550g7ts33/vewikizokefativ.pdf
    • http://bright-mineral.com/uploadfile/file/2021063003481895.pdf
    • http://sl-light.ru/design/img/upload/file/88899454440.pdf
    • http://imaginove.eu/data/Files/31329961654.pdf
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/47251282692.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160eca0d97e86c---11047150500.pdf
    • http://tareeapartment.com/user_img/files/73276794560.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=where+to+get+a+driver%27s+handbook+near+me
    • 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_off0000e99d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 16792 bytes
font_01_sfnt_off000101b4.bin
c3a5c39be4323c1d24424aad42f6902041b381ba027c7c0678a9d8f4bbe88408
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B4 10972 bytes
font_02_sfnt_off00011ae2.bin
2910eff06b93462d2aa324b41efbdd9abefb60e86c0b0b3a4be82200f9623c75
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE2 17640 bytes