Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65909906b7e3383…

MALICIOUS

PDF

1.19 MB Created: 2021-06-13 08:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0f254cf08b3c6b5e080ef093c6d35b8 SHA-1: 2cfeee0967be5400bb8c6c85757a5f109ea03691 SHA-256: e65909906b7e3383d5428b1074c90daa88899bc7258c77bcf4664f5a69e17fd7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external resources, including one that masquerades as a solutions manual for a technical book. Several of these links point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5629

Heuristics 5

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=matlab+for+engineers+5th+edition+solutions+manual PDF link annotation
    • http://temple.mo/userfiles/file/20206715908.pdfIn PDF document text
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072c5bdc3106---49292043565.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/lobota.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a678ca8a980---sabuzunawidis.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/45060464319.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a0ec4ff2e019012ef5b0c3aca6e89ae5/58011384614.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sd2s08bs21l625kffisv7b08s1/gujazawenadolidunipisu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/4tgjq58971u7e3b3bic876h719/lonomises.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/wawurokekixefubomivososo.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbabbbc978---97008043563.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3f73bda64---wanoga.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210603134756.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4dcea7c9f3---wajeleserivavejubibu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b61fe72ada6---demegofozizagikopidora.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e35c71df8---nezurupowojulepivogiropi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0012602c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12602C 5588 bytes
SHA-256: b45b0bd58acacbe8b06337bdf9994a54443842cb562d978ad57788fcf828c7f5
font_01_sfnt_off001272e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272E3 1216 bytes
SHA-256: 3c6640f2df0c49ef14048226e8792f7373eb5ebb764ff2b4fa005780be7df8a4
font_02_sfnt_off001279f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F3 22352 bytes
SHA-256: f98875c7538bb086d0839eee66bdcc56bd1e3c4a3779b26ebf4048d50ad28416
font_03_sfnt_off0012bcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCD5 16632 bytes
SHA-256: 93fd7776b2f514c9210fdb600451d33a1fa4177b86608f5484bd4a38f475b382
font_04_sfnt_off0012d404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D404 6068 bytes
SHA-256: 7173460d918b5bb2cb6fca2efdf00d9450ff55bf29fc69a8df01b6f4505c9c1a