Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d295d0e9f6ae01…

MALICIOUS

PDF

79.2 KB Created: 2021-09-12 23:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6ce4712b5a7453adb5de04fb42d4a388 SHA-1: 07157b6e05f21db4b40ce0e4b17bb2330117aee8 SHA-256: 75d295d0e9f6ae0151b42f56fa9ea462bded39aa63513f5cbc53a302bcda4c74
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'download button' lure and ML classification further indicates malicious intent. While no scripts were directly extracted, the overall structure and linked URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://matsusushionline.com/uploads/files/91243112321.pdf In PDF document text
    • http://langfordfinancialservices.com/userfiles/files/kabiritemalefotutisulave.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210905_21EE4AE3124A7003.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/fexukexi.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/71532572744.pdfIn PDF document text
    • http://yanartextil.com/firma/files/13039006151.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381855a7744---kikepa.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/114kip77160cvu207oq7bqlcmi/34573777710.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/99432652129.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/lumujifobowariwawefenisal.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/67490869180.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/xelopuwewibosijekojexem.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/27032418216.pdfIn PDF document text
    • http://shriramashramps.org/userfiles/file/geloreroxafezafa.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/zubegesa.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/texuw.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/wizifok.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-11/20210911171010993996.pdfIn PDF document text
    • http://mutitar.com/user_img/files/jedanomebex.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d077833c7158072a8d28f702a3fb451a/4012983150.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138ff7eb86f7---jokalojolurixibogejun.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c4ca79172---70088459053.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/00388d5c100c88fedc3aef199ac3a1c7/gamejojazagiluwofek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lucky+patcher+appPDF 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_off0000d1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D7 17968 bytes
SHA-256: ca2831daacbb586e67a273837a804ef71d1e1844522e22a28192ae58df1dfc91
font_01_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 10204 bytes
SHA-256: 0d782356f0b4e33ba3250c125418c181768322d2dcb9f359e68e6dc136e81204
font_02_sfnt_off0001176b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1