Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f696d0ea45a5a54…

MALICIOUS

PDF

85.8 KB Created: 2021-07-08 07:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7f4dae48363186e33a4fc96c341de87d SHA-1: 9ca7911f27049c7a0cd4e8c7a2c7f1ca2b9abd54 SHA-256: 1f696d0ea45a5a54e59075b88fc101aeee6134a2011a1f7b3a8e09d0219ad6fe
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated and unreadable, providing no further context on its specific purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c94a4970b---81380738614.pdf In PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/tieg31baq86o14pp73g3fhrf41/funubalokofaxanur.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c86d900c477---fewiw.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/38514997337.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a659a0144e7---popurivoneriwex.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b2fe7e0c4c910fd38ec082a9855dccfd/59279599657.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/47061619766.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d7119abd8cc7d1791e4293411a7b522e/23913910005.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/c0p81f76k12lq166ol80h6lg40/59436157269.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fb0ed697a---27301983390.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/lamolixe.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/finumokipadujisojizo.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/19055378688.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c2kim325u9p50jctqfq9gqaqj6/liwapalutusulu.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85336a110b---vakalewa.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12ceb16072---44419841872.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b95737b8c---nufujadotunetofalakazarap.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/sazalevapetewodufin.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/b11db96260a2db76f841a13ce6eeed63/segivukegakaputibuxilit.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/864640dc8908429853962cecc01f19f5/punamafofegob.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/diloxafiwuroxamukaboza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=any+link+to+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_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10751 10116 bytes
SHA-256: 4f49c8d4c19dbe520196767380699c41310901c54c4dd1d96f11de28abd217bb
font_02_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 16996 bytes
SHA-256: 54a86a084283c821e7c4d4b70ae40cbf62e6dce92b256f93c3825f854e94b8f4

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