Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb4aa476e5d61b7…

MALICIOUS

PDF

86.4 KB Created: 2021-08-09 20:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8a939ed21400ca37a914b92422e9aea9 SHA-1: a45ad44ccab3e7499898c23feda96e213448b19a SHA-256: 1eb4aa476e5d61b78a0c654731862b020e57369970b2ba647b4ba3c033b01480
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links, many pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of 'utm_term=home+depot+credit+card+login+genesis' in one URL indicates a potential phishing lure for financial credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92db22e0a---sowatikanajufukikej.pdf In PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0d7b82355f74cdec7f90c0fe94388581/23045503989.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/bizanuwujodipodajo.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/rasibovejaboforelowakaxak.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9606dfde0---3337835175.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/78153406490.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/37241748172.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5dec5fcc3---wixozepokokufoduzewovunuz.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/75388722863.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1610f0d8e47146---libugazok.pdfIn PDF document text
    • http://ranch.pl/files/file/pegazeg.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/batukemuv.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087436eb372d---soxugogotutamewosujuze.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/25567186514.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/xidoxeriwekusa.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/015412d6247cb9519aa40ea72ca4d86a/vawevutipudutumopibesevu.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a6e14e69eaf156776e7a228bab9aa2e7/lumatugujomigunal.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/91fpaiklsmvqn9nhf1huvkl9pi/50791885322.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fdc9ad0d---88404977050.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/kijefobubotuxinixerat.pdfIn PDF document text
    • https://motacademy.it/file/sixaroxanuleselivifudojip.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72251187113.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609884cb5c3c7---dafobinekalavu.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/raxapobixugarixavuxuged.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f89ac64cf89---1642775753.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=home+depot+credit+card+login+genesisPDF 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_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 10848 bytes
SHA-256: 266975b0cfb5a31edae236afa7e9afd6a35e4a47d898970715958516bee05b3a
font_01_sfnt_off00010411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10411 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C23 17020 bytes
SHA-256: bdaba03e69e0f58dad25e03de291d6a1467a32870588659360a7b96038028b99