Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e074a63b2eceec8…

MALICIOUS

PDF

100.7 KB Created: 2021-06-27 09:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c1aee1178e99efbc3000a7aac17f1c3 SHA-1: f9a96c9262123015b06299393e01ed8289878878 SHA-256: 9e074a63b2eceec811803cfa31357122f01c9d6dcee08e143f60c23ce335b821
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating an attempt to redirect users to malicious content. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggests these links are part of a malicious infrastructure. The embedded JavaScript likely facilitates the redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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.
  • 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 http://drkoopman.nl/cmsimages/file/gujokuripesojeke.pdf
    • https://tsydesign.com/userfiles/jws/files/56466136246.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/koreml2fhpptfkenflmvb9je46/nogozixis.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/3ej99odhambs704a9imubbd5g2/tovotanorogewemozib.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/r9i66co5eqe5a9sala2m8b7850/besidiroxodex.pdf
    • http://nemdanangpho.com/uploads/2021-05-27/images/files/40661142968.pdf
    • http://chieusangducphat.com/uploads/userfiles/file/tarujezuzalunelazez.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ad5e9a3a7ca---34110009706.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b734322d1---sotibuboduzisugajezexed.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720f4bb695a---lepexafapozoduxawesolaja.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609401c3b478b---4742233182.pdf
    • https://hotelindigha.com/FCKeditor/file/58655913690.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a0816f4b---nitadogirinomojijosi.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861ddcd5c8f---linabalo.pdf
    • http://mid-europe-ex.com/images/blog//file/wojuzepejevab.pdf
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/dunofaxisekataxuxa.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c2450c2b8ad3a41e93e2e3a318ef9c12/21567646823.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090a35a23ab9---38110155121.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b632b0ee066---jipudilasodawejatonera.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a28cf3e3c6c---86524416950.pdf
    • http://interface-referencement.com/userfiles/file/85715533564.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e952f18ac1---14284760514.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16082ca02a3c9f---litipepi.pdf
    • http://nyett.hk/uploads/news/files/52807539275.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=minecraft+how+to+make+a+spawner+farm
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128fa.bin
0648ca5ddea1e82c5dcd3884235011ccaa69e9254c4a0aa74f31f2b41e7b9ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0x128FA 16612 bytes
font_01_sfnt_off00015456.bin
973be0a77dd64859057f4f3bd411164e55e3b544482bc85521080d34c87648c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x15456 10872 bytes
font_02_sfnt_off00016d65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D65 16792 bytes