Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ad7a7e0e0f0788…

MALICIOUS

PDF

98.6 KB Created: 2021-09-07 11:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e0a0f6718c9f0f050a1335b1d99b27b SHA-1: bf7a2b5a0bd565f099e5ac56b679bf78115b42a9 SHA-256: 04ad7a7e0e0f0788ed76167120493336a373837fbd13af97233d967c308f71ae
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to potentially compromised websites, suggesting a link farm or phishing lure. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, which is a common technique for executing malicious commands or downloading further payloads. ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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
  • 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 http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc9615060---jotupikovefakumizan.pdf In PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16109f0c9e726e---gigobowoxivuvikozos.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/68982533767.pdfIn PDF document text
    • http://secretinvitation.net/images/files/91122138716.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/72147009679.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/58855645392.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/gegiles.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2ce407d00---65013508499.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/78ee7eec8193d7c2b4df726fa853d07e/93560673014.pdfIn PDF document text
    • http://www.centralperdana.com/file/buxure.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/zolikedil.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/tipaw.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210907_113716.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/94011639626.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e13a3dd7596aa20e12288df2fc618d5/29495814621.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/15371749864.pdfIn PDF document text
    • http://jentretiens.ch/uploadimage/gedexirukud.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/tosulutob.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/bamutanemepimaguragabu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac599f79f4a---mitakuxixavizotet.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/dee9a4f70f562dc1b18579114a150c23/13289151317.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/xamexolo.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/jirimi.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/4546199893.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/widopunorugikinoki.pdfIn PDF document text
    • http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/fijoririxofogeda.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/xofuguvifowokerup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=verifone+mx915+manualPDF 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_off00011a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4D 10632 bytes
SHA-256: 285ef45a3070e6b3038cdb8c7c9c7602583cc84d113d7325e5600278c3b6dced
font_01_sfnt_off000132b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC9 19172 bytes
SHA-256: e177dfc634fa7223d2fe34939604758edb99019e2e4c9cda1b10863303c92e3f