Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d600c6b178f4ac…

MALICIOUS

PDF

71.1 KB Created: 2021-09-22 11:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57f5f1676cc943700cdc03d688e65f9e SHA-1: f49f85360b6564b6a5f56b5eb73aaf0b00d89149 SHA-256: 77d600c6b178f4ac818ba30e8184d49b9c7531e8fb8564b987ac5b52e6db9590
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to potentially compromised or disposable hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript is likely used to facilitate the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://slicktechproducts.com/newerac2c/userfiles/file/gizedi.pdf In PDF document text
    • http://veganogle.es/uploads/ckfinder/files/xoxenenezeravuv.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/75623146047.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/60385594587.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161319b14d421d---fomurojivisubugofibedeb.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/10857400606.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/68723482857.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/bupakaxabikinopafikeb.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/65661466136.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/lidezemujunedapitijes.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/43d0901b6a2cdd6009a8414159c1b8fe/94432239788.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/31204979113.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae7d7ecf87---85949350364.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/7430487348.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/fojak.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/79704918497.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/rakigenukibabopapemuvapu.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/welomugo.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/nakawi.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/87295541028.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16141dc941735a---29315631173.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/xugepesafuxepusano.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/dalunekezizidamobu.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/59135413567.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/19/35316206925.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/velosi.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/8845942684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+use+zanti+without+rootPDF 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_off0000b54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54F 16968 bytes
SHA-256: 621029f42c7c094700c2e3daed35d73680b3f207e7981c68a76e08adff44933e
font_01_sfnt_off0000df47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF47 10396 bytes
SHA-256: 441b67b3d1df3e6ced49c74702454917b24ae71dad09e3e14b42aa63573f9f6e
font_02_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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