Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3074ba8feaad9b…

MALICIOUS

PDF

114.0 KB Created: 2021-09-05 11:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf97df1623ba76cb08d9ac2befe644cc SHA-1: 752cc76eb249d856e0fa72abca95f14540576adb SHA-256: 6b3074ba8feaad9b3b522a39cdabf38bb916498a924cea3a98b3a2b77419e874
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/4d5060170c475acac0508b187ce6c94f/xomuxotu.pdf In PDF document text
    • http://akicgiyim.com/userfiles/file/30425007254.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/76828413221.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f224c4627c---15430630452.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20218171033200.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/48412349398.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/35ce5a82c2f6e2d4ac2e059f0fcda8b0/kozibotoxusuvuxizekusir.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/48781818942.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/jerebewojamanerag.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/lowibefivotugofow.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/5983163401.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/254dd1009bcca6e3fc8973d2317e6ae5/kuvoxon.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/11653527556.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d94b53e873a---59673800527.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/936c29c0f94f698815128c830cec07f5/fevunomulajevix.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/zibatajetovoteratu.pdfIn PDF document text
    • http://poultech.net/d/files/28448695444.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/ruxur.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/73997611758.pdfIn PDF document text
    • https://purefeeling8.com/data/file/158127521.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/61346904646.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9bc526fbf49c3d6fe56e171e680da6a5/gupujinofoxopananiwafil.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/gemutotuzon.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/muzususelurezupafi.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b0ae2d9572d4c338a8fc4620fe3de5b4/selekudikimu.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/259ce431668404e45606881e2fe6e326/65941270617.pdfIn PDF document text
    • http://cesmclassof68cheyennewy.com/clients/82478/File/44590142333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=gmc+yukon+2009+manualPDF 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_off0001577a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1577A 18948 bytes
SHA-256: 26bc381bace2c021707581cd203b38a27ef21170f70fcef4e322144ab3ccbdd5
font_01_sfnt_off0001882c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1882C 10556 bytes
SHA-256: 9f83e9c18a3cda08822b4c228813db6e0dfdb308d2d7f0b508a0ec83b23aa3a0
font_02_sfnt_off0001a05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A05B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1