Malicious PDF — malware analysis report

Static analysis result for SHA-256 60eebaaf69e3daa5…

MALICIOUS

PDF

91.1 KB Created: 2021-07-25 04:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d5e4c5f395c014f83db0f2f389ab31a4 SHA-1: 640b6257efe57e1fdee2cf487c058045f12cf407 SHA-256: 60eebaaf69e3daa50a01a88f3079c7ba226f6751b8bd645a4ab4f1c8d52fb06d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The presence of multiple compromised CMS upload links suggests a pattern of hosting malicious content on vulnerable websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed3615797d---nanuvi.pdf In PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b686a48b5ee---dakomedanogarumawi.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/gubujajode.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b094731fd07---63611045848.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/18174670480.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5abada7221---nesexapuxiwuwat.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/40356610080.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/66114279655.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/desujil.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/xudigapatekewudizewiruka.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab465d73122---kazefulabol.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021061300314080554.pdfIn PDF document text
    • http://hak-al.com/resimler/files/fopopidotivosuk.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/26732095027.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086731668c8c---fosikakom.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/33069478279.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/puzosiposi.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3nqgnavc1u6md4geca63cio6k0/79474235783.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210719084558651.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/n7amom4ipf2m0kku3vadtol2uk/jozujo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc1422861---zigat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+measure+kpi+in+project+managementPDF 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_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11626 11068 bytes
SHA-256: aa33466bd9b7da83d259b5a75162ae4827b59ee9b017e8a5dd93e6be2fa11c8a
font_02_sfnt_off00012ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF2 17564 bytes
SHA-256: 39191e690a86921d25c5860277ad1551f5ac8cdc520aac9e28ee9aecbc6a8795

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