Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcac8618603be930…

MALICIOUS

PDF

89.9 KB Created: 2021-07-30 08:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d35d5145c993dc5fcd544ad3bccbbf69 SHA-1: d10dc846c45bc3d311650171ba515bca19bef9a6 SHA-256: fcac8618603be9303db52833f4044f2cd52dd2d9bbe007845c0ff79094befc76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, 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 external URI links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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
  • 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://smidgel.ru/uplcv?utm_term=full+surah+yaseen+pdf+download PDF link annotation
    • http://werder-ritter.de/UserFiles/File/76256772589.pdfIn PDF document text
    • https://heider.ru/wp-content/plugins/super-forms/uploads/php/files/ed867a79c5e04a794d06616a02ff56e9/84598454313.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bc5bd73f0c4f3be63420869696898712/nezegig.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1304a6d5a---jobaka.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/37478581060.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/f06c9bde4d64e82c9b87562bed85c84c/20891115722.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a4eea17f8---kumarefatadexupitolajab.pdfIn PDF document text
    • https://seerupit.dk/assens/file/5293644973.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b872e5e491---32703120691.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/wopizajadet.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f74e56ed19---60633587958.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pllo8ng54rq48nj4e4vudva2o3/fenuwajuzibovip.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/cee054c67f071dfe774768899ade757a/91494600384.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/rajin.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/19425839009.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72d51d4dd---66942580923.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/lanux.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14ec220abc---14013073345.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3861f3514---77935224518.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/lulur.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/linetanalagoluwizix.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210728_4AD37A66F2873305.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 10680 bytes
SHA-256: eb98f41315bf416efff5f36a124e901136e653e0c3faa905732c9476b088fe83
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C74 17428 bytes
SHA-256: 782737d6f0b3a0c9e061b7ca858bb9e83e24503bfaf97b8f820441f9d5d8abbb
font_03_sfnt_off00013a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A89 18912 bytes
SHA-256: 4ca238f495f19dfb651c59e85afc419ba1124804522ff17e43dff272fdf3b7cc

Open this report in the interactive analyzer, or submit your own file for analysis.