Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d48e2a53d0f457…

MALICIOUS

PDF

102.8 KB Created: 2021-09-04 11:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c5416aac92465b7dd7c3e63ecdad203 SHA-1: 3596bea821285b15308a9ab42a560fea1b8add15 SHA-256: d1d48e2a53d0f4578e511b7ad6ab4f4d7744344e8b3a205ef354a03bb1b9511b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phishing lures. No scripts were extracted, but the presence of numerous links to potentially compromised domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/67rbpnmkuqk7a1higi5gom5dfn/25474900931.pdf In PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d682c149c23---kutusexufujinaz.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/wugudiki.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/usmn8kipeuqcaeftlakr8mcep0/5248619124.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/72965801752.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ab2c13c7f---89692321406.pdfIn PDF document text
    • http://meuseguro.top/fotosempresa/files/58635599403.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/8d3e2e022be910d479095de4e4a4b416/9251929274.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/gagor.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/85637939593.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/taxisijowasi.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee7669bf85---musawanajudomukufu.pdfIn PDF document text
    • http://tele-video.ru/upload/files/rojudivajirito.pdfIn PDF document text
    • http://mfahk.com/upload/files/13521855734.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/60710500285.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/44148822295.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/dipamazojatojiniponowa.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/buseni.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d9c92e750c904e4ac7853276df69186/13165280739.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608034638a76a---23263230965.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/kosowezenevutuw.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0344be6d1d76a5a44887e8e1d7eca454/31171181204.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/5ababe4c2213188ae5608fcfa77f8249/nakuremap.pdfIn PDF document text
    • https://meccanicagambirasio.it/file/dasat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=swms+template+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_off00012dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFF 18676 bytes
SHA-256: d057844e77a0d52be30c789434c6263880b73ef553f5d93eebb451de59cb13ad
font_01_sfnt_off00015df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF6 10404 bytes
SHA-256: 41d592aa591f1e3d9543288357a323ab6f929526999da8c0649699014c88fd4d
font_02_sfnt_off000175a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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