Malicious PDF — malware analysis report

Static analysis result for SHA-256 38687817f690124a…

MALICIOUS

PDF

133.8 KB Created: 2021-06-26 06:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2dfc62a5d2d99bee0ec7d84aff46218a SHA-1: dd8bd2752a4cd35647286e9a2ed6e506cf8612c2 SHA-256: 38687817f690124ae338a85afa5c133a322c76a0aed73d31505f1594073e840a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. The numerous embedded URLs, many pointing to compromised WordPress sites, suggest an attempt to host or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://inwebjor.ru/uplcv?utm_term=9.3+1.2+packet+tracer PDF link annotation
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160745ada073fb---wimerubiligupezefetib.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871ee4028f3---dejasoziloge.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609847cc49ab3---dolusekubomomaleloz.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0vh7nneb7k3659g8212u159c6c/jawab.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/26400601088.pdfIn PDF document text
    • http://m2m2design.com/userfiles/78300864955.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/df699949337ee860731d6e7c3e28f4e4/wiforifupuv.pdfIn PDF document text
    • http://vaughanreunion.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/21504852160.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/zupunabe.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/kivuxutudedufido.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/03676ebb3d4c1180311ce91e74f81f52/34787344463.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/a3d427259b684a28acee0c896cc72076/wumedigodojekolude.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/qvdg3br4m6pihglsq7ithbjvj3/faviwajazixuwovutuf.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a0fb7e10b---80741471204.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/xijepasamasik.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/42c17faf1cd5dae63bc487ea42c59c1a/wuxujapuxijeratawujefo.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/iqr84sdhss2uagku4g0o3r91sc/jedezonejudixire.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1c02928826d4c71cb52fec45b050a5d2/46753587896.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da0bac4069---zataxololer.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/vuvorotivuwi.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/1322109c61f82bfb3b1db3060def844e/57924297215.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1cf40a589---65559815576.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/e33f71d230c4161f44695adf9d3d2909/dinajokedigam.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/149bdc061f1611bb9b2e0c4d338f0491/57252495546.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccd03bcf98---runesakesasi.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743de8958e0---jipowa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A94E 18100 bytes
SHA-256: 500b8f83009afae2f3ce472d592c6ef2dac0f561111ca034e444d574b033ac79
font_01_sfnt_off0001d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D98D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1A4 10412 bytes
SHA-256: 650185036d62f8d9c2acd57312deeb15e04fa10c2c123bcfa57991613e1b8865