Malicious PDF — malware analysis report

Static analysis result for SHA-256 02249709274a9426…

MALICIOUS

PDF

79.7 KB Created: 2021-09-08 06:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3c578e8f60bcd2f45d9f032b5a54b86 SHA-1: 9de56ac9a2bacec1a3436940c4edfbc8b7c42cda SHA-256: 02249709274a94261c3e46e3a47af82de1b00314e3af03fec149d807d95dd8c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as a link farm, with numerous URLs pointing to potentially compromised websites. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing or trojan delivery mechanism. The document body is heavily obfuscated and contains no readable content, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://serka.com/serka/upload/files/poriladewoto.pdf In PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ab3c1272c---92388694014.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/936c06d03d4a2959df85dcc8c98d0332/bazowopipepunu.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/kovital.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/baad154bc942fb19e0d08cfa92e4d379/74252212027.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/minisejujuvejeguf.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085910055655---83850817777.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/71183384220.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/e48541d4a4ba6c59041e886590e6b9fb/wabapoxu.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/27819324503.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/27444691410.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29493107889.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160810e6950458---50658508062.pdfIn PDF document text
    • http://thejosephinebryantfamily.com/clients/48776/File/84258901956.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/132178495460a775e0704b6.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/23663127938.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/jifuz.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/pakiluwofomoreworetupe.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b198e712496---zurukifakalivego.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fdcb73e55---56700863036.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/64b68c610a423fb3565d41d723fce24a/73976284418.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/16094727091.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/jiranaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+can+i+manually+eject+a+cd+from+my+macbookPDF 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_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 16688 bytes
SHA-256: 00c5e3d6828953693b4926c3c77ee577e4c3c05a835e6e7bd542fe96866b9510
font_01_sfnt_off0000ff41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 11120 bytes
SHA-256: 3db69f4cefe232d98a6ad8a7df87ad85b8f95de6a187540525d41bdc16ff249b

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