Malicious PDF — malware analysis report

Static analysis result for SHA-256 2992d27bd6aeb8cb…

MALICIOUS

PDF

80.1 KB Created: 2021-09-18 07:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9ff877fd024d6d99d31b71cb324f731b SHA-1: 1380aabdeb6d7284ed5b657d268352dd4d49b58e SHA-256: 2992d27bd6aeb8cbd4661711d73b4a28cc027367ed3bf471a778cf22977bc8b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external resources, some of which are hosted on compromised websites. The presence of a link farm and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/59008182267.pdf In PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59334137454.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/libifasudes.pdfIn PDF document text
    • http://z500.si/files/fokikubikim.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161403af0d347f---74258050255.pdfIn PDF document text
    • https://maria-galland.ru/files/file/41577792219.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b1ecddb4b---nanesolupanaxipesogunalow.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137cfdca218b---70648140357.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136dddb8b980---63680393742.pdfIn PDF document text
    • https://quatden.vn/webroot/img/files/12152678487.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/16706874473.pdfIn PDF document text
    • http://iltorg.ru/upload/file/88175902767.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/94801895884.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613440ee363a1---10496461423.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9593750f4a6e3307bc4f996ce96f92ea/xalemijinufoxu.pdfIn PDF document text
    • https://avenue102.com/uploads/file/87688751339.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/domes.pdfIn PDF document text
    • http://ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/660774062.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/21361931360.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/49237911175.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/wuposofavalemajizo.pdfIn PDF document text
    • http://turatabor.hu/media/xevijukutuxoduzo.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210917055627404059kygk8.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/73618597478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+stb+emu+proPDF 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_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 10788 bytes
SHA-256: a3d0a849f0c8ca5ec324ceb124d22016fab2bf41d8a08cdacd51ebd8810d6876
font_02_sfnt_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 19636 bytes
SHA-256: c320b4e9030415a93e7d0ccb13ab5e0f3a8adfcfa353a99639d0346ad143a754