Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc75f0e89ea2fc…

MALICIOUS

PDF

89.7 KB Created: 2021-08-01 18:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 6a6aac450b26f4e4e9c7cd1eea9ce86e SHA-1: 8e0acd35a3274ba09dbf69197c9099b3987c1151 SHA-256: 5ebc75f0e89ea2fc65b57b47882b84b8d152796814e6d7a2ae747243770f099b
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=madinah+arabic+book+1+handout+pdf PDF link annotation
    • http://www.lugashotel.com/data/editorfile/1530692017.pdfIn PDF document text
    • http://planetamama.ru/files/file/39897972792.pdfIn PDF document text
    • http://maxbrio.kr/files/files/53476967461.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/tojuba75dvdu3qhjutu1friqlf/fanogunumisalaz.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/96445463424.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb0f7045a8---71449397757.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/30498898322.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/mujagerovo.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/kibopezirenew.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/botubaraliwivaxi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71d89bfe84---domidukolurajaxupiwufa.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/62d35b085335a199fe61faf9be643d1b/29958306070.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/90481d0f42bfb523001ff5b859a60281/xigaduvid.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160989b0030c9b---59100623177.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/c11f1d75ce6f2e188b40d158ae465305/wixanigenevexubotunirawe.pdfIn PDF document text
    • http://furniture83.com/upload/files/muguwowibejezemoxijobanid.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/zexelamepidif.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/12b660f87cdb0d3486d3c374968e1c38/72373887509.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ipm5kemcvjhfnlo10vativ4sh4/rigojo.pdfIn PDF document text
    • http://belst.by/upload/file/zaninezoxixafigevegobem.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/be45e960451916737bd9ac7be595b190/madejidavifeluzesomuwam.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e3c8a7bdd3df9f833d90ca460f385f41/45796167537.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/46208492033.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/nipoxadibubidaxovuzalotu.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/3003780814.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_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 10748 bytes
SHA-256: 9bc9de21cc318afdb315a31e7d7d55e992c41ee297ed44ef359284c29b68fd49
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11174 16564 bytes
SHA-256: 0274f78cc2758ee965bd3fb81e1bf23f4b306690fb54f7b5416107b9b65f1b7f
font_03_sfnt_off0001289d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289D 17948 bytes
SHA-256: 29e57437c3fa7b8642b73433026f693958c75aa1eaea928d0b68116926ba38a6

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