Malicious PDF — malware analysis report

Static analysis result for SHA-256 472aee011f27d5fa…

MALICIOUS

PDF

84.3 KB Created: 2021-07-02 01:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68689f4753ede1154604975329422554 SHA-1: 844325a3616486a1552b3b0f625b03d1b56fba38 SHA-256: 472aee011f27d5fa25f64c0fc0a5e008abbd73862f154f6c12e199a40f1f6d72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on potentially compromised or disposable domains, indicating a link farm designed to direct users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://vitalchurchesinstitute.com/files/file/6194400875.pdf
    • http://gayaarchi.com/userfiles/file/20210530215534.pdf
    • https://mebelihome.ru/upload_picture/babiwizaxunabezuzepojer.pdf
    • https://securityguardsupply.com/php/uploads/file/xatidezomezujemox.pdf
    • https://gruntbudowa.pl/files/file/momunotizezirafetuwe.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/72750947498.pdf
    • http://dzbnf.com/upload/file///57189222787.pdf
    • http://dent-pro.cz/pic/file/74575845556.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac036c1fc---83241468402.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a49bd9e2cfc---85489883911.pdf
    • https://telewebmarketing.com/FCKeditor/file/gudakizopumipepasumirufil.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/d6b9f40c11b39efbcca228e1927ed8e5/68723107049.pdf
    • https://tecnibat.net/uploads/archivos/vigukis.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bdeb3d846---7209390918.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba096c510fb---lofomeli.pdf
    • https://aravlicraft.com/cmsCart//upload/file/pibuzufefix.pdf
    • http://cattaneoarchitetti.it/userfiles/files/25514251816.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/cc8b53ba3cb1abfe7fdecf987a39d83b/xejuniminikivirepufug.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/6palbunn3l5fe10hv72smbj0l3/taxogijesumebubifojo.pdf
    • https://j-kowalewski.pl/uploads/userfiles/files/radawajifilafosexomopevoj.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f523916716dceb8b47d8ae61ae2413d0/vujosodij.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3c7ab1816---rojikuxizevinuzodalep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=tds+on+purchase+of+immovable+property
    • 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_off0000e454.bin
01a98be44b66e7073b2493f665780401b8a2f2be22cf844c9e6cffff5f735825
pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 11268 bytes
font_01_sfnt_off0000fe66.bin
39d1dd9b160a9e2cae2bc0ad46e417d715745ff9575346bbe24cc2db1181a364
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 17384 bytes
font_02_sfnt_off00012c28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C28 16792 bytes