Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8e501d65623d92…

MALICIOUS

PDF

83.4 KB Created: 2021-10-09 03:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3f82dbdfff7f58fd62de0a70291cd34b SHA-1: 5a9242ac3d8970d9000ff4f1a80edf100b5bc0b9 SHA-256: ba8e501d65623d923300a4f15f2138a3f4321a98660117c6dd071e6bfb2aabd7
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=latin+phrases+about+time PDF link annotation
    • http://imobilestore.de/userfiles/file/bapumufuxafizovun.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/rakimurujejelosiburewil.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/xaviweluwutilaxugaxuvipug.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/gasofomuf.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/65986450286.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/sagok.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b041a959c5ddf6dfb0af010861b6fc0c/69561961579.pdfIn PDF document text
    • https://taumed.kz/upload/2021/10files/211005164757242344k6pza.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/48390517266.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/176dc68ce2c257006e3b2ff954347df6/37043442002.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16160bdd0b5a0f---gasesiwegup.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/rapaguraje.pdfIn PDF document text
    • http://webursitet.org/Files/file/misidevore.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/76647586268.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/jopuba.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/gulajumoxizopowemebuza.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/puxesumiridexobon.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/fekup.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/jimigenogikegipa.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/zowarefixevujawosixe.pdfIn PDF document text
    • http://ned.ru/uploads/files/72364872334.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/86491149408.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/14704646963.pdfIn PDF document text
    • http://ondamarinarest.com/upload/files/11970386458.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 10668 bytes
SHA-256: e0635859ae6e0e82e8e0813859e88d7cadc5716d8d9f633568857e7af9f10c27
font_02_sfnt_off00010b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B15 20812 bytes
SHA-256: 9a40e55bd6eca8d5f341a42b1b6fe44a7f5e3be345e3678f75a62ba1e4cb1376

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