Malicious PDF — malware analysis report

Static analysis result for SHA-256 e24de3a048757b75…

MALICIOUS

PDF

122.2 KB Created: 2021-07-02 03:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc38d39c487a053b09b26d2d650d1e1c SHA-1: 9cb57609befff93eca600c4721b4b25f95039244 SHA-256: e24de3a048757b758ccd6d30ac6d891a713bc99ff32cd47674d0661d2cbf7adc
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/hd8sot92tfg5237pb0a2nrg4l4/xiwozekofaxasikop.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a80247a0---jopinejewajalorinisetam.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/bca0e0a63cb4b5238311b7e849fae63a/torowewugovobexo.pdf
    • https://ketdoanbus.com/webroot/img/files/lirodozivukegopipowaza.pdf
    • http://www.hydro-tg.pro/upload/file/gelifomabudadafu.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1o54b2n5tsh7ect67gvljl08vb/13470502177.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/6ce3f4942bff0188a7bb27fb929a3b35/luril.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25b1941b7---16256779494.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608543fde8bcc---batuxubosaleg.pdf
    • https://susta.vn/userfiles/file/95540025473.pdf
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/84239858952.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e9836fd8a---55716719066.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4161e0877---83462542713.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/0fiagva1h422j0vikagfmh5385/76486559422.pdf
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/7496529897.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac95ce9f663---33274835940.pdf
    • http://alexhofford.com/temp/files/file/57734691940.pdf
    • https://deniz-sogutma.org/img/userfiles/file/vaxobefobogir.pdf
    • http://soft-pro.hr/upload/datoteke/65281404318.pdf
    • http://frangarcia.eu/upload/file/rexokololedi.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1251b69d2---34851390060.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/njn91jg3bk0a5fd6m7uq5mlgik/dodurirakubirosanumizatu.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/kn80feeh80gfh7rul8lvkkhbim/94684080209.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68bc7db459---jagufarizelufemefulagos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=intellect+meaning+in+english
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015ea6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA6 16792 bytes
font_01_sfnt_off000176bd.bin
eb948b090ac168c530730fc040208297052de140d92400996250d7fa56ee5a4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x176BD 10408 bytes
font_02_sfnt_off00018e10.bin
8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
pdf-font-stream PDF embedded font (sfnt) at offset 0x18E10 16060 bytes
font_03_sfnt_off0001a31f.bin
aacddfc8751c673d84d74ee8cfa8a78b44ed9e7090f263599b8a8b2af16fb2f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A31F 20800 bytes