Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae7cbb86d680f2a…

MALICIOUS

PDF

78.2 KB Created: 2021-09-05 23:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 079ddfdb7487f0691f359a8578b1bcc2 SHA-1: 72562cea0bf56a61a53a1ed6acc9ff02592f7637 SHA-256: 9ae7cbb86d680f2a09be8218318efe70b192dd38c7f01a5d79ab454a8c530ab4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/3d3a4f4a8eec9df34ab66cb338e29fcb/filagiwasujew.pdf In PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/dupevozujujexiwenajomema.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608fce446880e---xavilanujemad.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/97760114016.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/8bb30e6dd3d24b9e800e4429b02832df/86425304511.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/21962377170.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/75126ccfc7e9bf4b26357668c0b0a0ea/95282384187.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/6292357060.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20216201038342337.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/6350d3535c06d0a8a2c5a616fe0d15cf/zuselosaberuresufiji.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/12994506183.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b462c6dae---9360564580.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210827_201336.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/85375160726.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/72662672640.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/wenumepoka.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/81051031358.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/03258c88ac69ccd5eb7d5a378a1fbc19/42113623475.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/76438188686.pdfIn PDF document text
    • http://kgmda.com/upload/files/xozakirisunusekofapodov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=manuale+di+letteratura+e+cultura+inglese+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 10768 bytes
SHA-256: 89bc0c32f814690b4e91c90b58bea1bc782d9f86f9c5b0c27aff187fee58478e
font_01_sfnt_off0000e53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 17516 bytes
SHA-256: 95e8b33c741c88b18097709495ce1e1be80f38ec377660ff903a3b791a67e327
font_02_sfnt_off0001133a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1