Malicious PDF — malware analysis report

Static analysis result for SHA-256 c200489ef7a3f189…

MALICIOUS

PDF

70.4 KB Created: 2021-09-04 02:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7ba79a8cbea7a62ad18a87f212c7b199 SHA-1: d6f48edc6ca56a644e41797f7e88be7f1a8d5541 SHA-256: c200489ef7a3f189aafee75b041a8fef1c04f4189e774ea0f1faed7fb60b8013
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://oniceh.ru/uplcv?utm_term=spanish+worksheets+free+printable PDF link annotation
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4a135cb8b---35235487482.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/53951342577.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b45d55dd762d95e51d8c7083421422bb/17019939485.pdfIn PDF document text
    • http://fgosvo.ru/files/files/podiwenumavadibateki.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9fa96c9b8---batadepolujep.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16ce3e7bec---navipifore.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/lhkrc782i3j2vh0v48hacnmvch/vagupolurex.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/94168430160.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/60888099075.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/16a5a626d3559a0929df55c8f973420c/26339139556.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/30857878906.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/35732399580.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/90541831714.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/wesedevawawitelulukujik.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/76603062954.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/refaguwuliraveximedavowud.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/sarisofok.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ba650d0559225c155971d65c659c5047/nupulovetawipofelapativi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/e2h11610p5msfk4a81ihj3811e/42200770560.pdfIn PDF document text
    • https://unique-u.biz/images/uploads/file/fifubuvufudivosanu.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/12166362911.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_off0000b231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA43 16572 bytes
SHA-256: 86e9e3b17e4c2aa0fefa987e86514c05e1794094adab4c8ff08dbd6d60a22f04
font_02_sfnt_off0000f333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 10848 bytes
SHA-256: 9758d14a101060a8e8faf299cda596454d5460197f2b22174becbfc112dfd248

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