Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcb27c7dd330349…

MALICIOUS

PDF

72.3 KB Created: 2021-09-12 03:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 82292dbf902d47c8b9b15381a5f98caf SHA-1: 5d21d7d7c24dfad8d4dc4b8af7277307bfc09b7a SHA-256: 2fcb27c7dd3303490e5172d588f49efdfe71e70128bda9739539419b71237484
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://globalfeedindustry.com/upload/files/kiziraro.pdf In PDF document text
    • http://cobe-ing.it/userfiles/files/dezogewepomozajebol.pdfIn PDF document text
    • http://taigesw.com/upload/files/mosaz.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/minaretozigeke.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/kagupevexujir.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37683f0b8---radulute.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16132231a34dc5---zemimobivafubakaterun.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/57064426169.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/patovajonujebe.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/c87d9d88d719587464ae1c92fad1402b/78399070369.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/8125649012.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/54376925523.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/tazosebenezozi.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/38703699248.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/gelekex.pdfIn PDF document text
    • https://afmiletisim.afmiletisimajansi.info/resimler/files/ronibugavos.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/37448923244.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/16076105969.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/31275539113.pdfIn PDF document text
    • http://citranco.com/users/files/60877088124.pdfIn PDF document text
    • https://tdfstore.it/file/kakifurotifubop.pdfIn PDF document text
    • http://jljemc.com/upload/files/92493310062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=i+love+us+all+episodes+watch+online+freePDF 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_off0000b902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB902 16256 bytes
SHA-256: 5845ca3cbddeb45919e777dc5647302bc1cb0488d636144e2267d74ab281b01f
font_01_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 10920 bytes
SHA-256: c48e88225d430e7195b5893179097ab1c7a7ec74d235d68ec5bf26d4d5d3a237

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