Malicious PDF — malware analysis report

Static analysis result for SHA-256 296d33ddca9a17c5…

MALICIOUS

PDF

99.0 KB Created: 2021-07-14 07:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38b4b9f12103ff0fc3ec12e80e135196 SHA-1: 863f93fcd8da620c3005c91a079f88e686547f64 SHA-256: 296d33ddca9a17c5c45f57a6ec5b802a4ff8c6b19ef2c4f7317234b96d7082c6
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests an attempt to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/oau2ejnnooe6t011c483godehf/puvotabuxofurologuxuzas.pdf In PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0224e62f4d---xalipuxi.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/surodefijitanovejofag.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096c2d2c4cb6---bibuperef.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/51355386870.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/4cb76a86e7301ad256e67a3e147b7096/fojowojolovazetasalibi.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/vufurufoniko.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/14570419854.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/877e709ac1b8b901220f334cc5ab2e8b/rakasurojexuxowiguwopifo.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/fae3d0d0963b255243ecafc271a9d93c/kupobajefod.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/64674596925.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16099d19936f6c---nanegevifax.pdfIn PDF document text
    • https://pellevah.com/upload/files/86600998300.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607deb7954ccb---dekukamexewuxizaveruzi.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/92ce140a0c333150aacc3a59ce9ca955/68399525493.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/nemixe.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fa41c960c---6392213884.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/bimukobofazetufopisinu.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/26299440418.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/semisarireguwewiwuz.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/eee138ad116c14b3c1455bd24dd9724b/tatiladaneritizuwomi.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/23284964683.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/feb461aefb00174c6293d45aa028f9f7/tuzijarugonoloko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=turkish+code+of+obligations+english+pdfPDF 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_off00011d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 18616 bytes
SHA-256: 2816b06c12b988844dae1a835543deed7085a48dd57818503825f68bc09f8422
font_01_sfnt_off00014b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1636A 11192 bytes
SHA-256: 38bfb0e42085476febafd47e6c9c23ff4a140cc455ca82ed87ebf432216a4a25

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