Malicious PDF — malware analysis report

Static analysis result for SHA-256 be96b66cab3d9b1f…

MALICIOUS

PDF

91.6 KB Created: 2021-08-20 05:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6cdbee76ab768253c879e28181b71b1e SHA-1: 7a0384c4846609b9a4c7bf58c464b1672ebd9900 SHA-256: be96b66cab3d9b1fe2dfa2d379bb2f865fa092b60a9c9bf62b2a1586c8b98d00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious content or phishing pages. The presence of external URIs and link farms suggests an attempt to distribute malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pistant.ru/uplcv?utm_term=obtener+diamantes+gratis+para+free+fire PDF link annotation
    • https://ijtm.in/userfiles/file/jufedomuxafojikugezifi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078efc95a591---54203932749.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609306fe3d5ed---zebopifi.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0d552bc71---47460876514.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/nasevarivos.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83852323668.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/2dd9b31da4d8cf77306749c7c8048a27/wupivakarebekimakiti.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/15467117596.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/zojenimoturawakabulef.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075440772303---8138195979.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfa0977c90d---25144875886.pdfIn PDF document text
    • https://mar3ol.com/Files/files/debimatusejalun.pdfIn PDF document text
    • https://marblobaths.ph/app/webroot/img/files/sadakijexavitelefazujifaf.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ede434d64cfbc765939738904f57c5ea/rexez.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/xuvubarorawap.pdfIn PDF document text
    • https://gilbertems.com/videos/file/18087302191.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/rujivufuguvimelazozujexu.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/31633269024.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2092339e9c---45029585524.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/48623839894.pdfIn PDF document text
    • https://egf.tw/test2/images/file/wavereravelidufe.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/32l8p1c9rc3pth8j72ff9ur9eu/zejovasazefa.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/mejirabewitabezukuvavuwog.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/refadixi.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 10840 bytes
SHA-256: 55bb8628f815090fddb42220a8c70d9f10356447f74891ce51920a4d3a111811
font_02_sfnt_off00011a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A83 16336 bytes
SHA-256: 47d6f68e1005e6641acb9d8903ddb6bb5dfd30cee0f01f0faded011c5708b1f3
font_03_sfnt_off000130ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AD 18304 bytes
SHA-256: 0290235ee9c32250221b81b269199257e9f7a95e8346907dc3a57a489a3c6cc8

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