Malicious PDF — malware analysis report

Static analysis result for SHA-256 609cac43226a6fdd…

MALICIOUS

PDF

81.0 KB Created: 2021-07-24 22:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0d387640df37994794708743f9bc76ac SHA-1: 8080f0fb0f82dd01e272aaeee24fb625477c0154 SHA-256: 609cac43226a6fdd8ef2d961c77119580b3e86e8ed4f94a34538355252dae776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple potentially compromised websites, as evidenced by the PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics. The embedded URLs suggest an attempt to phish for information or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kodcomputers.ro/2664/uploads/mofadozujozoniripi.pdf In PDF document text
    • http://asbu.net/uploads/FCK_files/file/1176762391.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/rizokigifepibifezosima.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/78ef4b60cf3fcedcbcc2e4b84023a460/70093652716.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/94512469107.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/31a6f486aae547761fed08b1df2540e5/50861096310.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d650c03e204---85938244178.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1b3cb1c035070871609d2776fce52c95/nodemusuzuzoke.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/75463376704.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/famowi.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c6e157fd---17803336893.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/u6ondrhi2d188qka8hjqctqoni/87624863561.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/7ldrr39mlk1vf51gpl6b2nbqt1/xevebopegoraketaxezip.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/fgonib5kmp8cr2ummlut9mbau5/88747869261.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/iiv4anashvk02bre01brvlm018/85803812705.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/eqfapf075j20em4jr3gqjdqq6k/nazogewobud.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/57402074174.pdfIn PDF document text
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/supiwizifesegamujosogu.pdfIn PDF document text
    • https://magerp.org/upload/files/zagevijezotavomodug.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/98294713861.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ef696a0894a8cc41e3ad696ca6871eff/tetipurekojefusoxes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=may+who+full+movie+subtitle+indonesiaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD876 16836 bytes
SHA-256: 3c769778aa41c42ec5180607f075273eb95a520bcb61ef8c91cf7ec281a23d58
font_01_sfnt_off0001046f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 11020 bytes
SHA-256: 0f66c9867dd2aa034a545ba3649973e3808dc8098edf373169ca5c07740d2151
font_02_sfnt_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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