Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee6800e89ea8f0d…

MALICIOUS

PDF

82.5 KB Created: 2021-09-09 15:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f232934688bf9e595b2b66433981bc58 SHA-1: 2c2aa6af75477851f9a065737a0b64ed4827d1e4 SHA-256: 8ee6800e89ea8f0d37ea9ff4e682f163f149b67543d09e552e74d07b0b1d96ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm with numerous embedded URLs, many pointing to compromised or potentially malicious sites, suggesting an attempt to redirect users to phishing or malware-hosting pages. The presence of multiple external URIs and link farm indicators strongly suggests a malicious intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://postelezmasivu-zlin.cz/ckfinder/userfiles/files/15884242653.pdf In PDF document text
    • http://savages.lu/imagesRTE/files/8769380051.pdfIn PDF document text
    • https://cet.sk/res/file/58103858078.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/kejon.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161348d3a72d85---46673045356.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/62998e5e2234755e90ce2ba46ed81f59/zidedutipuwewavafefitam.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/xanozakibajad.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210904235100_cxbnc6.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/7bf56bae7785c8aaa5f8c7b939ba7270/81198129575.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/77706472253.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/7fa0cd698fa5e4e3a6535c8267a7ec9a/muwemoguduru.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/53439503613.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/fotujojigezupilumub.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/navasup.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/27880849906.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/5c3153ea6d4b171d6208f0ec1dc11542/74938069727.pdfIn PDF document text
    • http://cartopack.be/Images/file/30218423033.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/44210148029.pdfIn PDF document text
    • http://gibisch.biz/files/files/80417512897.pdfIn PDF document text
    • http://indemo.pl/Image/files/40109739697.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/xuxotoguguwanulegirezub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=china+smartphone+price+in+bangladeshPDF 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_off0000d8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BD 19208 bytes
SHA-256: f27ed09e034bcb98b0ffe2c8f4bbc0ad6636ff1ef9b3d695b38d7edccdf3266d
font_01_sfnt_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 11132 bytes
SHA-256: 5f7657fa04c460ee5804999b73e377c3f473a19f98a3c50c0bc0d1ced2d404df
font_02_sfnt_off0001249f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1249F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1