Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abae651c3275d3f…

MALICIOUS

PDF

93.4 KB Created: 2021-08-24 14:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 87d3eebe68b7a61c9fad5910e7270b2f SHA-1: 3c4ff6642fbcc5c9a04061696028aefa0ba7cc5f SHA-256: 0abae651c3275d3f691004502d8044ef0c3efeb35981de5798715fe56c8d1876
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. Heuristics indicate the document functions as a link farm, with many embedded URLs pointing to compromised or disposable hosting domains. These links likely serve as lures for phishing attacks or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://meganimal.pt/site/upload/file/58199770773.pdf In PDF document text
    • http://fandimnarodaku.cz/upload/file/kupogik.pdfIn PDF document text
    • http://xn----8sbosgn1al9i.xn--p1ai/ckfinder/userfiles/files/nutidivezi.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/29279610113.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/gupotulaxudesonotake.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607873f0283b6---vunemabimizaxaz.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b064c1e27d2---89623544030.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/23f75e36aec69bcfd69e49c7ced8cc60/sizuzupadapul.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/9090687147.pdfIn PDF document text
    • https://basisnomor.com/contents//files/dulelodubekosapigitego.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/3033906628.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/70053535278.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/g16ssqoq2c34f3f0l3oip6qog4/gototivopi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/dfd1bd10b356e3e72b1b66ebe5f4781b/ludijugogixuvisuf.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/58475785173.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac70915ea53---41227630028.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/pikaz.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/53284674722.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/99023998866.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/bexitigelix.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/tthgs7gjhbhnm7ndetn45f1k9e/59398856984.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926bf188757---rigapeluzefunefefa.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/22217234946.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/17102209959.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/23506772064.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/79905646406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=gastronomic+food+meaningPDF 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_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CC 10812 bytes
SHA-256: bed67cb535d5a10aa67ade653e6fb7e5e137c05a30a81ef875c3f1a443fb8e0b
font_02_sfnt_off00013a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8C 17360 bytes
SHA-256: ee00290fead02e72dda14deb7e705bfb819ef6a101926b526f71269efa13d93c